'Angels of God' in the Bible

For in the resurrection they neither marry nor are given in marriage, but they are as angels of God in heaven:

But I say unto you, that every one who may confess me before the people, the Son of man will also confess him before the angels of God.

But the one denying me before the people will be denied before the angels of God.

So, I say unto you, there is joy in the presence of the angels of God over one sinner that repenteth.

And He says to him, Truly, truly, I say unto you, you shall see heaven open, and the angels of God ascending and descending upon the Son of man.

And again when he may lead in the first begotten into the world, he says, Indeed let all the angels of God worship him.