Genesis 3:24
"So he drove out the man; and he placed at the east of the garden of Eden Cherubims, and a flaming sword which turned every way, to keep the way of the tree of life."
Cross References (ranked by relevance)
And of the angels he saith, Who maketh his angels spirits, and his ministers a flame of fire.
Who maketh his angels spirits; his ministers a flaming fire:
Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
And it came to pass, when Joshua was by Jericho, that he lifted up his eyes and looked, and, behold, there stood a man over against him with his sword drawn in his hand: and Joshua went unto him, and said unto him, Art thou for us, or for our adversaries?
Give ear, O Shepherd of Israel, thou that leadest Joseph like a flock; thou that dwellest between the cherubims, shine forth.
The LORD reigneth; let the people tremble: he sitteth between the cherubims; let the earth be moved.
So the people sent to Shiloh, that they might bring from thence the ark of the covenant of the LORD of hosts, which dwelleth between the cherubims: and the two sons of Eli, Hophni and Phinehas, were there with the ark of the covenant of God.
Speak unto the children of Israel, that they bring me an offering: of every man that giveth it willingly with his heart ye shall take my offering.
And the ass saw the angel of the LORD standing in the way, and his sword drawn in his hand: and the ass turned aside out of the way, and went into the field: and Balaam smote the ass, to turn her into the way.