The revelations (each known as Ayah, lit. "Sign [of God]"), which Muhammad reported receiving until his death, form the verses of the Quran, regarded by Muslims as the verbatim "Word of God" and around which the religion is based. Besides the Quran, Muhammad's teachings and practices (sunnah), found in the Hadith and sira (biography) literature, are also upheld and used as sources of Islamic law (see Sharia).
The name Muhammad (d/) means "praiseworthy" and appears four times in the Quran. The Quran addresses Muhammad in the second person by various appellations; prophet, messenger, servant of God ('abd), announcer (bashir),[2:119] witness (shahid),[33:45] bearer of good tidings (mubashshir), warner (nathir),[11:2] reminder (mudhakkir),[88:21] one who calls [unto God] (dā'ī),[12:108] light personified (noor),[05:15] and the light-giving lamp (siraj munir).[33:46] Muhammad is sometimes addressed by designations deriving from his state at the time of the address: thus he is referred to as the enwrapped (73:1 and the shrouded (74:1. In Sura Al-Ahzab 33:40 God singles out Muhammad as the "Seal of the prophets", or the last of the prophets. The Quran also refers to Muhammad as Aḥmad "more praiseworthy" (Arabic: أحمد, Sura 61:6).
The name Abū al-Qāsim Muḥammad ibn ʿAbd Allāh ibn ʿAbd al-Muṭṭalib ibn Hāshim, begins with the kunya Abū, which corresponds to the English, father of.