Surah Az-Zumar 39:66

بَلِ ٱللَّهَ فَٱعْبُدْ وَكُن مِّنَ ٱلشَّـٰكِرِينَ

Rather, worship [only] Allāh and be among the grateful.

Translation: Saheeh International

Tafsir

Rather worship God alone and be among the thankful of His bestowal of graces on you.

Excerpt from Tafsir al-Jalalayn, commentary on 39:66, via Quran.com. The reader has the full commentary and 9 more tafsirs.