Matthew 24:30

And then shall appear the sign of the Son of man in heaven; and then shall all the tribes of the earth mourn, and shall see the Son of man coming in the clouds of heaven, with power and great glory.

Revelation 1:7

Behold he cometh with clouds, and every eye shall see him, and they who have pierced him: and all the tribes of the earth shall wail because of him.

Treasury of Scripture Knowledge

Summary

Behold, he shall come up as clouds, and his chariots shall be as a whirlwind: his horses are swifter than eagles. Woe unto us! for we are spoiled.

Bible References

Behold

Matthew 24:30
And then shall appear the sign of the Son of man in heaven; and then shall all the tribes of the earth mourn, and shall see the Son of man coming in the clouds of heaven, with power and great glory.
Revelation 1:7
Behold he cometh with clouds, and every eye shall see him, and they who have pierced him: and all the tribes of the earth shall wail because of him.