Revelation 4:8; Revelation 5:11-12; Hebrews 1:6

Revelation 4:8

8 And the four living creatures, each of them with six wings, are full of eyes all around and within, and day and night they never cease to say, "Holy, holy, holy, is the Lord God Almighty, who was and is and is to come!"

Revelation 5:11-12

11 Then I looked, and I heard around the throne and the living creatures and the elders the voice of many angels, numbering myriads of myriads and thousands of thousands,

12 saying with a loud voice, "Worthy is the Lamb who was slain, to receive power and wealth and wisdom and might and honor and glory and blessing!"

Hebrews 1:6

6 And again, when he brings the firstborn into the world, he says, "Let all God's angels worship him."