39:11
قُلْ إِنِّىٓ أُمِرْتُ أَنْ أَعْبُدَ ٱللَّهَ مُخْلِصًۭا لَّهُ ٱلدِّينَ ١١
Saheeh International
Say, [O Muhammad], "Indeed, I have been commanded to worship Allah, [being] sincere to Him in religion.
Tafsir of "Ibn Kathir" (English)
Say:"Verily, I am commanded to worship Allah, making religion sincerely for Him..."means, `I am commanded to worship Allah alone in all sincerity, with no partner or associate.'وَأُمِرْتُ لاِأَنْ أَكُونَ أَوَّلَ الْمُسْلِمِينَ