Revelation 8:6

New King James Version

So the seven angels who had the seven trumpets prepared themselves to sound.

Cross References

Matthew 26:17

Now on the first day of the Feast of Unleavened Bread the disciples came to Jesus, saying to Him, “Where do You want us to prepare for You to eat the Passover?”

Revelation 8:2

And I saw the seven angels who stand before God, and to them were given seven trumpets.