New Revised Standard Version
Then Gideon perceived that it was the angel of the LORD; and Gideon said, “Help me, Lord GOD! For I have seen the angel of the LORD face to face.”

Contemporary English Version
Gideon realized that he had seen one of the LORD's angels. "Oh!" he moaned. "Now I'm going to die."

New American Bible
Gideon, now aware that it had been the messenger of the LORD, said, “Alas, Lord GOD, that I have seen the messenger of the LORD face to face!”

Douay-Rheims Bible
And Gedeon seeing that it was the angel of the Lord, said: Alas, my Lord God: for I have seen the angel of the Lord face to face.

And Gedeon seeing that it was the angel of the Lord, said: Alas, my Lord God: for I have seen the angel of the Lord face to face.

perceived

Judges 13:21 And the angel of the Lord appeared to them no more. And forthwith Manue understood that it was an angel of the Lord,

because

Judges 13:22,23 And he said to his wife: We shall certainly die, because we have seen God. . . .

Genesis 16:13 And she called the name of the Lord that spoke unto her: Thou the God who hast seen me. For she said: Verily, here have I seen the hinder parts of him that seeth me.

Genesis 32:30 And Jacob called the name of the place Phanuel, saying: I have seen God face to face, and my soul has been saved.

Exodus 33:20 And again he said: Thou canst not see my face: for man shall not see me, and live.

Deuteronomy 5:5,24,26 I was the mediator and stood between the Lord and you at that time, to shew you his words, for you feared the fire, and went not up into the mountain, and he said: . . .

Isaiah 6:5-8 And I said: Woe is me, because I have held my peace; because I am a man of unclean lips, and I dwell in the midst of a people that hath unclean lips, and I have seen with my eyes the King the Lord of hosts. . . .

John 1:18 No man hath seen God at any time: the only begotten Son who is in the Bosom of the Father, he hath declared him.

John 12:41 These things said Isaias, when he saw his glory, and spoke of him.