Word by Word Analysis

وَمِنْهُم مَّن يَسْتَمِعُ إِلَيْكَ حَتَّىٰٓ إِذَا خَرَجُوا۟ مِنْ عِندِكَ قَالُوا۟ لِلَّذِينَ أُوتُوا۟ ٱلْعِلْمَ مَاذَا قَالَ ءَانِفًا ۚ أُو۟لَـٰٓئِكَ ٱلَّذِينَ طَبَعَ ٱللَّهُ عَلَىٰ قُلُوبِهِمْ وَٱتَّبَعُوٓا۟ أَهْوَآءَهُمْ 16

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, "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.