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

Wa yaa qawmi' maloo 'alaa makaanatikum innee 'aamilun sawfa ta'lamoona many ya'teehi 'azaabuny yukhzeehi wa man huwa kaazib; wartaqibooo innnee ma'akum raqeeb

"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!"

— Hud (هُود), 11:93