Translation of the verse 51 from Surah Al-Qalam : Number of verses 52 - - page 566 - Part 29.
And verily, those who disbelieve would almost make you slip with their eyes through hatredness when they hear the Reminder (the Quran), and they say: "Verily, he (Muhammad SAW) is a madman!"
And indeed, those who disbelieve would almost make you slip with their eyes when they hear the message, and they say, "Indeed, he is mad."
(68:51) When the unbelievers hear this Exhortation, they look at you as though they would knock you off your feet with their (hostile) glances. *35 They say: 'Surely he is afflicted with madness';
*35) "Would trip you up": "Would eat you up with their eyes". For a similar expression of the Makkan disbelievers' rage and fury against the Holy Prophet, see also Bani Isra'il: 73-77.