Establish prayer at the decline of the sun [from its meridian] until (17:78)

Almuntakhab Fi Tafsir Alquran Alkarim

You just engage in the act of worship and hold intimate mental and spiritual intercourse with Allah at the point of time of the suns declination or deviation from the Meridian or the zenith of the sky as it begins to sink toward setting and onward to the time when the darkness of the night prevails* And noteworthy is the Quran when recited at dawn. Indeed recital of the Quran at dawn is of great moment and a goodly loan. It inspires piety to the heart and makes the soul sensible of the presence of Allah; it is attended by the angels who witness its perusal

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(17:78) Establish Salat *91 from the declining of the sun *92 to the darkness of the night, *93 and be particular about the recital of the Qur'an *94 at the dawn of the morning, for the recital of the Qur'an at the dawn is witnessed. *95

Establish prayer at the decline of the sun [from its meridian] until meaning

*91) The Muslims have been commanded to establish Salat immediately after the mention of obstacles and adversities. This implies that the perseverance required to face adverse circumstances is obtained by the establishment of Salat.
*92) We have translated the words of the Arabic Text into "the declining of the sun. " Though some of the Companions and their followers are of the opinion that it means "the sunset", the majority of them are of the opinion that it means "the declining of the sun from its zenith." Caliph 'Umar, Ibn `Umar, Anas bin Malik, Abu Barza-tal-Aslami, Hasan Basri, Sha'abi, Ata', Mujahid and, according to a Tradition, Ibn `Abbas (Allah be pleased with them all) are of this opinion and Imam Muhammad Baqir and Imam Ja`afar Sadiq also are of the same opinion. Besides this, there are some Traditions from the Holy Prophet to the same effect, though they are not so authentic.
*93) According to some, the original words of the Arabic text mean "complete darkness of the night", while others take it to mean "midnight" If the first opinion is accepted, it will imply the beginning of the time of the 'Isha' Prayer and according to the other it will mean "the last limit of the time of "Isha" .
*94) The literal meaning of the word fajr is "dawn", that is, "the beginning of the morning after the darkness of night. "
Here the "recital of the Qur'an in the morning" stands for the Morning Prayer. At some places the Quran has used the word Salat for 'Prayer' and at other places a particular part of Salat for Prayer as a whole, e.g., tasbih, hamd, zikr, qayam, ruku', sajud etc. Likewise, here "recital of the Qur'an at dawn" does not mean the mere recital of the Qur'an but its recital during the Prayer. Thus, the Qur'an has also incidentally referred to the different parts of which Salat is composed and these guided the Holy Prophet to prescribe the definite form of Salat in which it is performed by the Muslims to-day.
*95) The recital of the Qur'an at dawn is witnessed by the angels of Allah to testify it, as has been explained in the Traditions. Though the angels witness each prayer and each good deed the special mention of their being witnesses at the time of the recital of the Qur'an during the Morning Prayer gives it a particular Importance. That is why the Holy Prophet used to recite long passages from the Qur'an during the Morning Prayer. His example was followed by the Companions, and the succeeding Muslim scholars held it to be a desirable thing.
In this verse, it has been briefly stated how to establish Salat which was made obligatory on the occasion of Mi `raj at the prescribed timings. It has been ordained that the first Prayer is to be offered before the sunrise and the remaining four after the declining of the sun till the darkness of the night. Afterwards Angel Jibril was sent to the Holy Prophet to define the limits of the timings of each Prayer. According to a Tradition of Abu Da'ud and Tirmizi related by Ibn 'Abbas, the Holy Prophet said, "Jibril led me in the five Prayers twice near the Ka`abah. On the first day, he offered the Dhuhr Prayer just after the declining of the sun, when the shadow of everything was the shortest. Then he offered the 'Asr Prayer when the shadow of each thing was equal to its own length; then the Maghrib Prayer at the time when one breaks one's fast, and the 'Isha' Prayer was offered just at the time when twilight had disappeared, and Faj rPrayer at the time when it becomes unlawful to eat and drink anything for the one who intends to observe a Fast. The next day he offered the Dhuhr Prayer at the time when the shadow of each thing became equal to its own length and the 'Asr Prayer when the shadow had doubled. The Maghrib Prayer was offered as on the previous day and the Isha' Prayer when one-third of the night had passed away, and the Morning Prayer when light had spread all over. After this Jibril turned towards me and said. 'O Muhammad, these are the timings of Salat of the Prophets and the right tunings are between these two extreme limits."
The Qur'an has also pointed to these five times of Salat on different occasions:
(1) "And listen; establish Salat at the two ends of the day and in the early parts of the night. . . " (IX: 114).
(2) "...And glorify your Lord with His praise before the sunrise (Fajr) and before sunset ('Asr) and then glorify Him during the night (`Isha') and then at the ends of the day (Fajr, Dhuhr and Maghrib). . . " (XX: 130).
(3) "So glorify Allah when it is evening for you (Maghrib), and when it is morning (Fajr). praise is only for Him in the heavens and the earth and glorify him in the later part of the afternoon ( 'Asr) and in the afternoon (Dhuhr). "(XXX. 17-18).
There is great wisdom in this system of the timings of Salat. One of these is to avoid the timings of the worship of the sun-worshippers. This is because the sun has always been in every age one of the greatest deities of the mushriks, who worshipped it especially at the time of sunrise and sunset. Therefore, these two times have totally been forbidden for Salat. Besides this, they worshipped the sun at the time of its zenith. That is why Islam has ordained that the Muslims should offer their two Prayers during the day-time after the sun has declined and the Fajr Prayer before the sunrise. The Holy Prophet himself has stated this wisdom of the timings of Prayer in several Traditions. For instance, in the Tradition related by 'Amar bin `Abasah, the Holy Prophet is reported to have replied to a qua"soon to this effect: "Offer your Morning Prayer, but refrain from it when the sun is about to rise until it has risen high. For the sun rises between the horns of Satan and the unbelievers fall prostrate before it at that time.
Then after mentioning the `Asr Prayer, he said:
"After `Asr Prayer, refrain from any Prayer until the sunset, for during that time the sun sets between the horns of Satan and the unbelievers fall prostrate before it. "
The rising and the setting of the sun between the horns of Satan is a symbolic expression that has been used in this Tradition. This implies that both these times are used by Satan as temptations for the people. This is, as if to say, that Satan is so pleased with the worship of the unbelievers at the time of sunrise and sunset that he appears to carry the sun on his head as a mark of approval. This interpretation of the Tradition is based on this remark of the Holy Prophet: "The unbelievers fall prostrate before it. "
 

Establish prayer at the decline of the sun [from its meridian] until meaning in Urdu

نماز قائم کرو زوال آفتاب سے لے کر اندھیرے تک اور فجر کے قرآن کا بھی التزام کرو کیونکہ قرآن فجر مشہود ہوتا ہے