Surah Hud, ayah 93

وَيَٰقَوْمِ ٱعْمَلُوا۟ عَلَىٰ مَكَانَتِكُمْ إِنِّى عَٰمِلٌ سَوْفَ تَعْلَمُونَ مَن يَأْتِيهِ عَذَابٌ يُخْزِيهِ وَمَنْ هُوَ كَٰذِبٌ وَٱرْتَقِبُوٓا۟ إِنِّى مَعَكُمْ رَقِيبٌ ۝٩٣

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]."

Quran 11:93 (Hud) · Saheeh International, Noor International Center (QuranEnc v1.1.2)