At-Tur [1] (Arabic: الطور, aṭ-ṭūr; meaning: The Mount) is the 52nd chapter (sūrah) of the Quran with 49 verses (ayat). The surah opens with the oath of the Islamic divine director swearing by the Mount,[2] which some believe is Mount Sinai, where the Tawrat was revealed to Musa. The chapter takes its name from "the mount" (ṭūr) mentioned in verse 1.

The surah addresses many of the arguments put to the Prophet by the disbelievers of Mecca (verse 29 ff.). The bliss that will be enjoyed by the believers is contrasted to the torments of Hell, and the Prophet is urged to bide his time, to continue to deliver his message, and to wait with confidence for God's judgement. God swears by, among other things, Mount Sinai, that the Day of Judgement is inevitable.