Adam Clarke's Commentary on the Bible - Genesis 18:2
Three men stood by him - עליו נצבים nitstsabim alaiv , were standing over against him; for if they had been standing by him, as our translation says, he needed not to have "run from the tent door to meet them." To Abraham these appeared at first as men; but he entertained angels unawares, see Hebrews 13:2 . read more
Adam Clarke's Commentary on the Bible - Genesis 18:1
And the Lord appeared - See note on Genesis 15:1 . Sat in the tent door - For the purpose of enjoying the refreshing air in the heat of the day, when the sun had most power. A custom still frequent among the Asiatics. read more