Tawheed is to knowing, believing, declaring, obeying the oneness and uniqueness of Allah. The Oneness of Allah i.e. Tawheed consists of three parts. (i) Tawheed ar-Rububiyyah (Maintaining the Oneness of Allah's Lordship). (ii) Tawheed al-Asma-Was-Sifat (Maintaining the Oneness of Allah's Names and Attributes). (iii) Tawheed al-Ibadah (maintaining unity of worship). Allah is the only 'true Lord'. In all matters related to Allah, Allah is One, Sole, Final, Perfect and without partners. He has no peer or equivalent. Allah is to be known by His most beautiful Names and Perfect Attributes. From the first man and the first Prophet Adam (a.s.) to the last Prophet Muhammad, may Allah bless him and grant him peace, the basic call of all prophets and messengers was 'La ilaha illAllah' (there is no 'true God' but Allah). Namely: 'La Ilaha IllAllah Adamu Shafiullah'', 'La Ilaha IllAllah Nuhun Naziullah'', 'La Ilaha IllAllah Ibrahim Khalilullah', 'La Ilaha IllAllah Muhammadur Rasulullah'.