Translation of the verse 16 from Surah Muhammad : Number of verses 38 - - page 508 - Part 26.
And among them are some who listen to you (O Muhammad SAW) till, when they go out from you, they say to those who have received knowledge: "What has he said just now? Such are men whose hearts Allah has sealed, and they follow their lusts (evil desires).
And among them, [O Muhammad], 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 Allah has sealed over their hearts and who have followed their [own] desires.
(47:16) Among them some give ear to you. But no sooner do they leave your presence than they ask those endowed with knowledge: 'What is it that he said just now?' *25 Such are those whose hearts Allah has sealed and who pursue their lusts. *26
*25) This is concerning those disbelievers and hypocrites and unbelieving followers of the former Books, who sat in the assemblies of the Holy Prophet, listened to his discourses, or the verses of the Qur'an, but since in their hearts they were averse to the themes presented by him, they would understand nothing in spite of listening to him. Therefore, when they came out, they would ask the Muslims, "What was he saying just now?"
*26) This was the real cause because of which their inner ears had become deaf tothe teachings of the Holy Prophet; they were the slaves of their lusts, and the teachings that the Holy Prophet was presenting fell against their lusts. Therefore ,if ever they sat in the assemblies of the Holy Prophet and listened to him, they would understand nothing.