The Revelation 10:5-7

Then the angel whom I saw standing on the sea and on the land raised his right hand toward heaven and swore by the One who lives forever and ever, who created heaven and what is in it, the earth and what is in it, the sea and what is in it, that there would be no more delay. But in the days of the voice of the seventh angel—when he is about to trumpet—the mystery of God is completed, just as He declared to His servants the prophets.