OLD TESTAMENT REFERENCES:

Cherubim at entrance to Garden of Eden, Genesis 3:24

Appear to Abraham, Genesis 18:1-33

Saved Lot and his family, Genesis 19:1-22

Intervened with Isaac, Genesis 22:11-18

Heavenly vision of Jacob's Ladder, Genesis 28:12

Accompanied Israel through the desert, Exodus 23:20 And  Numbers 20:16
 

Aided the prophets:

Isaiah 6:2-7

Ezekiel 1:4-28

Daniel 7:9-10

Zechariah 1:9-19


NEW TESTAMENT REFERENCES

Appeared in connection with birth of Christ:

Matthew 1:20

Luke 1:26-38


Appear to:

Paul, Acts 27:23

Peter, Acts 12:7-11

Cornelius, Acts 10:3-6

Sadducees didn't believe in angels, Acts 23:8

12 Legions of Angels, Matthew 26:53


Mentioned by name:

Raphael, Tobit 12:15

Michael, Daniel 10:13

Revelation, 12:7

Gabriel, Daniel 8:16

Luke 1:19


Fall of the angels:

Deuteronomy 32:17

2 Peter 2:4

Jude 1:6

Revelation 12:7-9