Then they will see the Son of Man coming in the clouds with great power and glory.
Mark 13:26
Surrounding context
13:25 the stars of heaven will fall, and the powers in the heavens will be shaken.
13:26 Then they will see the Son of Man coming in the clouds with great power and glory.
13:27 And then He will send His angels, and gather together His elect from the four winds, from the farthest part of earth to the farthest part of heaven.