Luke 11:30

11:30 For just as Jonah became a sign to the people of Nineveh, so the Son of Man will be a sign to this generation.

Luke 21:7

21:7 So they asked him, “Teacher, when will these things happen? And what will be the sign that these things are about to take place?”

Luke 21:25

The Arrival of the Son of Man

21:25 “And there will be signs in the sun and moon and stars, and on the earth nations will be in distress, anxious over the roaring of the sea and the surging waves.