Revelation 10:5-7

The angel who I saw standing on the sea and on the land lifted up his right hand to the sky,

and swore by him who lives forever and ever, who created heaven and the things that are in it, the earth and the things that are in it, and the sea and the things that are in it, that there will no longer be delay,

but in the days of the voice of the seventh angel, when he is about to sound, then the mystery of God is finished, as he declared to his servants, the prophets.