Az-Zumar • BN-TAFSEER-IBN-E-KASEER
﴿ قُلْ إِنِّىٓ أُمِرْتُ أَنْ أَعْبُدَ ٱللَّهَ مُخْلِصًۭا لَّهُ ٱلدِّينَ ﴾
“Say [O Muhammad]: “Behold, I am bidden to worship God, sincere in my faith in Him alone;”
Please check ayah 39:12 for complete tafsir.