Genesis 18:13 - Clarke's commentary and critical notes on the Bible

And the LORD said unto Abraham, Wherefore did Sarah laugh, saying, Shall I of a surety bear a child, which am old? And the Lord (Jehovah) said, etc. - So it appears that one of those three persons was Jehovah, and as this name is never given to any created being, consequently the ever-blessed God is intended; and as he was never seen in any bodily shape, consequently the great Angel of the covenant, Jesus Christ, must be meant. See note on Genesis 16:7.