Surah Al-A'raf 7:59

لَقَدْ أَرْسَلْنَا نُوحًا إِلَىٰ قَوْمِهِۦ فَقَالَ يَـٰقَوْمِ ٱعْبُدُوا۟ ٱللَّهَ مَا لَكُم مِّنْ إِلَـٰهٍ غَيْرُهُۥٓ إِنِّىٓ أَخَافُ عَلَيْكُمْ عَذَابَ يَوْمٍ عَظِيمٍ

We had certainly sent Noah to his people, and he said, "O my people, worship Allāh; you have no deity other than Him. Indeed, I fear for you the punishment of a tremendous Day."

Translation: Saheeh International

Tafsir

Verily laqad is the response to an oath that has been omitted We sent Noah to his people and he said ‘O my people worship God! You have no god other than Him read ghayrihi as an adjective of ilāh ‘god’ or ghayruhu as a substitution in its place sc. instead of min ilāhin ‘any god’. …

Excerpt from Tafsir al-Jalalayn, commentary on 7:59, via Quran.com. The reader has the full commentary and 9 more tafsirs.