﴿ أَلَمْ تَرَ إِلَى ٱلَّذِينَ أُوتُوا۟ نَصِيبًۭا مِّنَ ٱلْكِتَٰبِ يَشْتَرُونَ ٱلضَّلَٰلَةَ وَيُرِيدُونَ أَن تَضِلُّوا۟ ٱلسَّبِيلَ ﴾

“ART THOU NOT aware of those who, having been granted their share of the divine writ, now barter it away for error, and want you [too] to lose your way?”

(Seest thou not) have you not been informed in the Scripture about (those unto whom a portion of the Scripture hath been given) those who were given knowledge of the Torah, (how they purchase error?) they choose Judaism, (and seek to make you (Muslims) err from the right way) i.e. abandon Islam. This was revealed about al-Yasa' and Rafi' the sons of Harmalah, two Jewish Rabbis, who invited 'Abdullah Ibn Ubayy and his friends to embrace their religion.