﴿ يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِن تُطِيعُوا۟ فَرِيقًۭا مِّنَ ٱلَّذِينَ أُوتُوا۟ ٱلْكِتَٰبَ يَرُدُّوكُم بَعْدَ إِيمَٰنِكُمْ كَٰفِرِينَ ﴾

“O you who have attained to faith! If you pay heed to some of those to whom revelation was vouchsafed aforetime, they might cause you to renounce the truth after you have come to believe [in it].”

The following was revealed when the Jews passed by the Aws and the Khazraj and were infuriated by their comradeship and set about reminding them of their mutual hostility in the days before Islam such that they caused them to quarrel and the two tribes were on the verge of fighting one another O you who believe if you obey a party of those who have been given the Scripture they will turn you after you have believed into disbelievers.