Indeed, We have revealed to you, [O Muhammad], the Book in truth (4:105)

Almuntakhab Fi Tafsir Alquran Alkarim

We have revealed to you O Muhammad the Book –the Quran– in truth and in agreement with reality so that you Judge between the people in the manner shown to you by Allah. And so do not be deceived by the wicked who attempt to prejudice you and deceive you into using your authority to favour and vindicate those characterized with treachery

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

(4:105) (O Messenger!) We have revealed to you this Book with the Truth so that you may judge between people in accordance with what Allah has shown you. So do not dispute on behalf of the dishonest, *140

Indeed, We have revealed to you, [O Muhammad], the Book in truth meaning

*140). These and certain other verses which occur a little later on (see verses 113 ff.) deal with an important matter, related to an incident that took place around the time they were revealed. The incident involved a person called Tu'mah or Bashir ibn Ubayriq of the Banu Zafar tribe of the Ansar. This man stole an Ansari's coat of mail. While the investigation was in progress, he put the coat of mail in the house of a Jew. Its owner approached the Prophet (peace be on him) and expressed his suspicion about Tu'mah. But Tu'mah, his kinsmen and many of the Banu Zafar colluded to ascribe the guilt to the Jew. When the Jew concerned was asked about the matter he pleaded that he was not guilty. Tu'mah's supporters, on the other hand, waged a vigorous propaganda campaign to save Tu'mah's skin. They argued that the wicked Jew, who had denied the Truth and disbelieved in God and the Prophet (peace be on him), was absolutely untrustworthy, and his statement ought to be rejected outright. The Prophet (peace be on him) was about to decide the case against the Jew on formal grounds and to censure the plaintiff for slandering Banu Ubayriq, but before he could do so, the whole matter was laid bare by a revelation from God. (For the traditions cited here, see the commentary of Ibn Kathir on this verse - Ed.)
It is obvious that the Prophet (peace be on him) would have committed no sin if he had given judgement on the evidence before him. Judges are quite often faced with such situations. False evidence is given in order to obtain wrong verdicts. The time when this case came up for decision was a time of severe conflict between Islam and unbelief. Had the Prophet (peace be on him) issued a wrong judgement on the basis of the evidence before him, it would have provided the opponents of Islam with an effective weapon against the Prophet (peace be on him) as well as against the entire Islamic community, and even Islam itself. They could have spread the word that the Prophet (peace be on him) and his followers were not concerned about right and justice: it would have been claimed that they were guilty of the same prejudice and chauvinism against which they had themselves been preaching. It was specifically to prevent this situation that God intervened in this particular case.
In this and the following verses (105 ff.) the Muslims were strongly censured for supporting criminals for no other reason than either family or tribal solidarity and were told that they should not allow prejudice to interfere with the principle of equal justice for all. Man's instinctive honesty revolts against the idea of supporting one's own kin even when they are wrong, and denying others their legitimate rights.
 

Indeed, We have revealed to you, [O Muhammad], the Book in truth meaning in Urdu

اے نبیؐ! ہم نے یہ کتاب حق کے ساتھ تمہاری طرف نازل کی ہے تاکہ جو راہ راست اللہ نے تمہیں دکھائی ہے اس کے مطابق لوگوں کے درمیان فیصلہ کرو تم بد دیانت لوگوں کی طرف سے جھگڑنے والے نہ بنو