Al-Muddaththir 74:43

Surah al-Muddaththir is Meccan and among the earliest revelations; according to the report from Jabir ibn Abdullah in Bukhari, its opening verses came down after the pause (fatra) that followed the first revelation. With the command 'Arise and warn' it inaugurated the mission of open proclamation. The later verses of the surah are reported to have been revealed concerning al-Walid ibn al-Mughira, a Meccan notable who called the Quran 'sorcery handed down'.

Buhârî rivayeti (Câbir hadisi); Vâhidî, Esbâbü'n-Nüzûl