Abram fell on his face, partly in self-abasement, and a humble sense of his own undeservedness of such favours; and partly in reverence and worship to God, and a thankful acknowledgment of his marvellous kindness. Compare Leviticus 9:24 Ezekiel 43:3.
Related Commentaries of Genesis 17:3
Genesis 17:3
3 And Abram fell on his face: and God talked with him, saying,