Matthew 24:30
Then the sign [i.e., signifying the coming] of the Son of man will appear in the sky, and all the nations of the earth will be stricken with grief as they see the Son of man coming in the clouds of the sky [See Acts 1:9-11] with power and great splendor.
Revelation 1:7
Look, He [i.e., Jesus] is coming with [i.e., "on"] the clouds! And [then] every eye will see Him, including those who pierced Him, and all the peoples of the earth will grieve because of Him [i.e., because of how they had treated Him]. So it will be. May it be so.
Matthew 24:3
And as He was sitting on the Mount of Olives, His disciples came to Him privately, saying, "Tell us, when will these things [you just spoke of] happen? And what will be the sign that indicates your presence and the end of the [present] age?"
Matthew 26:64
Jesus replied to him, "You have said so; nevertheless I tell you, from now on you will see the Son of man sitting at the right side of Power [i.e., God Himself], and coming on the clouds of the sky."
Matthew 16:27-28
For the Son of man will return in the splendor of His Father, accompanied by His angels. Then He will reward or punish every person in proportion to what he has done [with his life].
Mark 13:4
"Tell us, when will these things [you just spoke of] happen? And what will be the sign [that indicates] when all these things are about to be fulfilled?"
Mark 13:26
And then they will see the Son of man coming in the clouds with great power and splendor.
Mark 14:62-64
And Jesus answered, "Yes, I am; and you will see the Son of man sitting at the right side of Power [i.e., God, Himself], and coming on the clouds of the sky."
Luke 21:27
And then they will see the Son of man coming in a cloud with power and great splendor [Note: This no doubt refers to the second coming of Christ. See II Pet. 3:9-10; Matt. 24:30-31; Rev. 1:7].
Luke 22:69
But from now on the Son of man will be seated at the right side of the powerful God."
Acts 1:11
and said, "You men from Galilee, why are you standing there looking up at the sky? This Jesus who was received up from your presence into the sky will return in the same way you saw Him go there."
2 Thessalonians 1:7
and to provide [future] rest for you, along with us, who are afflicted. [This will occur] when Jesus is revealed from heaven in blazing fire [i.e., at His second coming], accompanied by His mighty angels.