Hebrews 1:6
But speaking of the time when He once more brings His Firstborn into the world, He says, "And let all God's angels worship Him."
1 Peter 1:12
To them it was revealed that they were serving not themselves but you, when they foretold the very things which have now been openly declared to you by those who, having been taught by the Holy Spirit which had been sent from Heaven, brought you the Good News. Angels long to stoop and look into these things.
Revelation 5:11-14
And I looked, and heard what seemed to be the voices of countless angels on every side of the throne, and of the living creatures and the Elders. Their number was myriads of myriads and thousands of thousands,
Revelation 14:8-10
And another, a second angel, followed, exclaiming, "Great Babylon has fallen, has fallen--she who made all the nations drink the wine of the anger provoked by her fornication."