Surat Az-Zumar - سورة الزمر

إِنَّا أَنزَلْنَا إِلَيْكَ الْكِتَابَ بِالْحَقِّ فَاعْبُدِ اللَّهَ مُخْلِصًا لَّهُ الدِّينَ

Muhsin Khan: Verily, We have sent down the Book to you (O Muhammad SAW) in truth: So worship Allah (Alone) by doing religious deeds sincerely for Allah's sake only, (and not to show-off, and not to set up rivals with Him in worship).