Revelation 10:5-7

5Then the angel I had seen standing on the sea and on the land raised his right hand to heaven.

6And he swore by him who lives for ever and ever, who created the heavens and all that is in them, the earth and all that is in it, and the sea and all that is in it, and said, “There will be no more delay!

7But in the days when the seventh angel is about to sound his trumpet, the mystery of God will be accomplished, just as he announced to his servants the prophets.”