Revelation 4:8

4:8 Each one of the four living creatures had six wings and was full of eyes all around and inside. They never rest day or night, saying:

“Holy Holy Holy is the Lord God, the All-Powerful,

Who was and who is, and who is still to come!”

Revelation 8:3

8:3 Another angel holding a golden censer came and was stationed at the altar. A large amount of incense was given to him to offer up, with the prayers of all the saints, on the golden altar that is before the throne.

Revelation 14:15

14:15 Then another angel came out of the temple, shouting in a loud voice to the one seated on the cloud, “Use your sickle and start to reap, because the time to reap has come, since the earth’s harvest is ripe!”