Mark 13:24-27

But in those days, after that oppression, the sun will be darkened, the moon will not give its light, the stars will be falling from the sky, and the powers that are in the heavens will be shaken. Then they will see the Son of Man coming in clouds with great power and glory. Then he will send out his angels, and will gather together his chosen ones from the four winds, from the ends of the earth to the ends of the sky.