Surah Al-A'raf, ayah 59

7:59

لَقَدۡ أَرۡسَلۡنَا نُوحًا إِلَىٰ قَوۡمِهِۦ فَقَالَ يَٰقَوۡمِ ٱعۡبُدُواْ ٱللَّهَ مَا لَكُم مِّنۡ إِلَٰهٍ غَيۡرُهُۥٓ إِنِّيٓ أَخَافُ عَلَيۡكُمۡ عَذَابَ يَوۡمٍ عَظِيمٖ ٥٩

Laqad arsalnā nūhan ilā qawmihī faqāla yāqawmi'budullāha mā lakum min ilāhin ghayruhū innī akhāfu 'alaykum 'adhāba yawmin 'azīm

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."