﴿ وَيَٰقَوْمِ ٱعْمَلُوا۟ عَلَىٰ مَكَانَتِكُمْ إِنِّى عَٰمِلٌۭ ۖ سَوْفَ تَعْلَمُونَ مَن يَأْتِيهِ عَذَابٌۭ يُخْزِيهِ وَمَنْ هُوَ كَٰذِبٌۭ ۖ وَٱرْتَقِبُوٓا۟ إِنِّى مَعَكُمْ رَقِيبٌۭ ﴾

“Hence, O my people, do [to me] anything that may be within your power, [while] I, behold, shall labour [in God's way]; in time you will come to know which [of us] shall be visited by suffering that will cover him with ignominy, and which [of us] is a liar. Watch, then, [for what is coming:] behold, I shall watch with you!"”

Please check ayah 11:95 for complete tafsir.