And [Allah revealed] that if they had remained straight on the way, (72:16)

Almuntakhab Fi Tafsir Alquran Alkarim

Had they - the Pagans - followed the path of rectitude, We would have blessed them, and heaven would have prospered them with an abundance of rain mixed with blessings, spiritual, moral and material means of sustenance

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

(72:16) If *15 people were to keep firmly to the Right Way, We would have vouchsafed them abundant rain *16

And [Allah revealed] that if they had remained straight on the way, meaning

*15) The conversation of the jinn having come to an end, with this begins the speech of Allah.
*16) This is the same thing as has been said above in Surah Nuh: 10-11. "Seek forgiveness of Allah. .. He will send abundant rains for you from heaven. " (For explanation, see E.N. 12 of Surah Nuh). Abundance of water has been used for abundance of blessings metaphorically for human life and habitation depend on water. Without water there can be no human settlement, nor can man's basic needs be fulfilled, nor his industries work and prosper.
 

And [Allah revealed] that if they had remained straight on the way, meaning in Urdu

اور (اے نبیؐ، کہو، مجھ پر یہ وحی بھی کی گئی ہے کہ) لوگ اگر راہ راست پر ثابت قدمی سے چلتے تو ہم اُنہیں خوب سیراب کرتے