اللَّهُ، اللَّهُ رَبِّي لاَ أُشْرِكُ بِهِ شَيْئاً

Allah, Allah is my Lord. I do not associate anything with Him.

Allaahu Allaahu Rabbee laa 'ushriku bihishay'an.

Abu Dawud 2/87 No. 1525,Ibn Maah No. 3882, Also see Sahih Ibn Majah 2/335