Surah Ali'Imran, Verse 187

وَإِذۡ أَخَذَ ٱللَّهُ مِيثَٰقَ ٱلَّذِينَ أُوتُواْ ٱلۡكِتَٰبَ لَتُبَيِّنُنَّهُۥ لِلنَّاسِ وَلَا تَكۡتُمُونَهُۥ فَنَبَذُوهُ وَرَآءَ ظُهُورِهِمۡ وَٱشۡتَرَوۡاْ بِهِۦ ثَمَنٗا قَلِيلٗاۖ فَبِئۡسَ مَا يَشۡتَرُونَ١٨٧

wa-idh akhadha l-lahu mīthāqa alladhīna ūtū l-kitāba latubayyinunnahu lilnnāsi walā taktumūnahu fanabadhūhu warāa ẓuhūrihim wa-ish'taraw bihi thamanan qalīlan fabi'sa mā yashtarūna

And [mention, O Muḥammad], when Allāh took a covenant from those who were given the Scripture, [saying], "You must make it clear [i.e., explain it] to the people and not conceal it." But they threw it away behind their backs and exchanged it for a small price. And wretched is that which they purchased.