"Oneness of God" redirects here. For the concept of monotheism, see monotheism. Tawḥīd (Arabic: ; also transliterated Tawheed and Tauheed; Turkish: Tevhid) is the Islamic conception of monotheism. Tawhid refers to the act of believing and affirming that God (Arabic: Allah) is one and unique (wāḥid). In Islam, recognition of this principle is achieved by the first of five pillars of Islam, the Shahadah (testification of faith). The opposite of Tawhīd is Shirk (… (More on Tawhid)