Hud 11:93

وَيَٰقَوۡمِ ٱعۡمَلُواْ عَلَىٰ مَكَانَتِكُمۡ إِنِّي عَٰمِلٞۖ سَوۡفَ تَعۡلَمُونَ مَن يَأۡتِيهِ عَذَابٞ يُخۡزِيهِ وَمَنۡ هُوَ كَٰذِبٞۖ وَٱرۡتَقِبُوٓاْ إِنِّي مَعَكُمۡ رَقِيبٞ 93

And O my people, work according to your position; indeed, I am working. You are going to know to whom will come a punishment that will disgrace him and who is a liar. So watch; indeed, I am with you a watcher, [awaiting the outcome]