Quran Al-An'am 6:163

لَا شَرِيكَ لَهُۥۖ وَبِذَٰلِكَ أُمِرۡتُ وَأَنَا۠ أَوَّلُ ٱلۡمُسۡلِمِينَ

Translation

No partner has He. And this I have been commanded, and I am the first [among you] of the Muslims."