'Coming on the Clouds' in the Bible

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."

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."