Tawhid (Arabic: توحيد‎‎ tawḥīd, meaning the oneness [of God]"; also transliterated as Tawheed and Touheed) is the indivisible oneness concept of monotheism in Islam. Tawhid is the religion's most fundamental concept and holds that God (Allah, literally Al-Ilāh "the God") is One (Al-ʾAḥad) and Single (Al-Wāḥid).