Jami` at-Tirmidhi Book 47, Hadith 382
“I heard Ibn Umar say: ‘The Messenger of Allah said, “Indeed the least of the people of Paradise in rank, is the one who shall look at his gardens, his wives, his servants, and his beds from the distance of a thousand years, and the noblest of them with Allah is the one who shall look at His Face morning and night.” Then the Messenger of Allah recited: Some faces on that day shall be radiant. They shall be looked at their Lord.
“When the Quran was being revealed to the Messenger of Allah, he would move his tongue in attempt to memorize it. So Allah, Blessed is He and Most High, revealed: Move not your tongue concerning it to make haste therewith.” He said: “So he would move his two lips.” And Sufyan (a sub-narrator) would move his two lips.
“He frowned and turned away” was revealed about Ibn Umm Maktum the blind man. He came to the Messenger of Allah saying: ‘O Messenger of Allah! Guide me.’ At that time, there was a revered man from the idolaters with the Messenger of Allah. So the Messenger of Allah turned away from him and faced the other man, saying: ‘Do you think that there is something wrong with what I am saying?’ He said: ‘No.’ So it was about that that it was revealed.”