It was narrated from Muhammad bin Maslamah that when the Messenger of Allah صلی اللہ علیہ وآلہ وسلم stood to offer a voluntary prayer he would say: (Allah is Most Great. Verily, I have turned my face toward Him Who has created the heavens and the Earth Hanifa (worshipping none but Allah alone), as a Muslim, and I am not of the idolators. Verily, my Salah, my sacrifice, my living, and my dying are for Allah, the Lord of the all that exists. He has no partner. And of this I have been commanded, and I am the first of the Muslims Allah, You are the Sovereign, there is none worthy of worship but You, glory and praise be to You.)” Then he would recite. (Sahih)