Matthew 24:29-31
29 “Immediately after the tribulation of those days the sun will be darkened, and the moon will not provide its light, and the stars will fall from the sky, and the powers of the heavens will be shaken.
30 And at that time the sign of the Son of Man [coming in His glory] will appear in the sky, and then all the tribes of the earth [and especially Israel] will mourn [regretting their rebellion and rejection of the Messiah], and they will see the Son of Man coming on the clouds of heaven with power and great glory [in brilliance and splendor]. 31 And He will send His angels with a loud trumpet and they will gather together His elect (God’s chosen ones) from the four winds, from one end of the heavens to the other.
Mark 13:24-27
24 “But in those days, after [the suffering and distress of] that tribulation, the sun will be darkened, and the moon will not give its light, 25 and the stars will be falling from the sky, and the powers that are in the heavens will be shaken.
26 Then they will see the Son of Man coming in clouds with great power and glory [in royal majesty and splendor]. 27 And then He will send out the angels, and will gather together His elect [those He has chosen for Himself] from the four winds, from the farthest end of the earth to the farthest end of heaven.
Luke 21:25-28
25 “There will be signs (attesting miracles) in the sun and moon and stars; and on the earth [there will be] distress and anguish among nations, in perplexity at the roaring and tossing of the sea and the waves, 26 people fainting from fear and expectation of the [dreadful] things coming on the world; for the [very] powers of the heavens will be shaken. 27 Then they will see the Son of Man coming in a cloud with [transcendent, overwhelming] power [subduing the nations] and with great glory. 28 Now when these things begin to occur, stand tall and lift up your heads [in joy], because [suffering ends as] your redemption is drawing near.”