(18:2) Abraham lifted his eyes and he saw three strangers standing a short distance from him. When he saw them from the entrance of his tent, he ran to greet them, bowing down to the ground.
He saw three strangers Who were these three strangers? The angels Michael, Gabriel, and Raphael disguised as Arab wayfarers. Michael came to announce to Sarah that she would give birth to a son; Raphael came to heal Abraham from his circumcision; and Gabriel's mission was to overturn Sodom (Bava Metzia 86b).
(18:3) He said, “My Lord, if you would, please do not go away from Your servant.”
Please do not go away Rav Yehudah said: Offering hospitality to guests is greater than having a revelation of the Divine Presence. For it says [that] when Abraham wanted to welcome the three wayfarers, he interrupted the vision of God he was having and asked God to wait. Abraham said to God, “My Lord, if you would, please do not go away from Your servant.”