Surah Az-Zumar 39:14

قُلِ ٱللَّهَ أَعْبُدُ مُخْلِصًا لَّهُۥ دِينِى

Say, "Allāh [alone] do I worship, sincere to Him in my religion,

Translation: Saheeh International

Tafsir

Say ‘God alone I worship devoting my religion purely to Him pure of any idolatry.

Excerpt from Tafsir al-Jalalayn, commentary on 39:14, via Quran.com. The reader has the full commentary and 9 more tafsirs.