Surah Muhammad, ayah 16

وَمِنۡهُم مَّن يَسۡتَمِعُ إِلَيۡكَ حَتَّىٰٓ إِذَا خَرَجُواْ مِنۡ عِندِكَ قَالُواْ لِلَّذِينَ أُوتُواْ ٱلۡعِلۡمَ مَاذَا قَالَ ءَانِفًاۚ أُوْلَٰٓئِكَ ٱلَّذِينَ طَبَعَ ٱللَّهُ عَلَىٰ قُلُوبِهِمۡ وَٱتَّبَعُوٓاْ أَهۡوَآءَهُمۡ ١٦

Waminhum man yastami'u ilayka hattā idhā kharajū min 'indika qālū lilladhīna ūtul-'ilma mādhā qāla ānifan ulā'ikal-ladhīna taba'allāhu 'alā qulūbihim wattaba'ū ahwā'ahum

And among them, [O Muḥammad], are those who listen to you, until when they depart from you, they say to those who were given knowledge,¹⁴⁹⁹ "What has he said just now?" Those are the ones of whom Allāh has sealed over their hearts and who have followed their [own] desires.