Charles Ellicott Commentary Genesis 18:22

"And the men turned from thence, and went toward Sodom: but Abraham stood yet before Jehovah." — Genesis 18:22 (ASV)

Abraham still stood before the Lord (before Jehovah). —The two angels went on their way in form as men, towards Sodom, but the one who was a manifestation of Jehovah (Genesis 18:13, Genesis 18:17) remained behind.