Hud - 11:93

وَيَا قَوْمِ اعْمَلُواْ عَلَى مَكَانَتِكُمْ إِنِّي عَامِلٌ سَوْفَ تَعْلَمُونَ مَن يَأْتِيهِ عَذَابٌ يُخْزِيهِ وَمَنْ هُوَ كَاذِبٌ وَارْتَقِبُواْ إِنِّي مَعَكُمْ رَقِيبٌ
[11:93]
And, O my people! act according to your ability, I too am acting; you will come to know soon who it is on whom will light the punishment that will disgrace him and who it is that is a liar, and watch, surely I too am watching with you.
"And O my people! Do whatever ye can: I will do (my part): Soon will ye know who it is on whom descends the penalty of ignominy; and who is a liar! and watch ye! for I too am watching with you!"
And, O my people! Act according to your power, lo! I (too) am acting. Ye will soon know on whom there cometh a doom that will abase him, and who it is that lieth. And watch! Lo! I am a watcher with you.