והנה שלשה אנשים. אֶחָד לְבַשֵּׂר אֶת שָׂרָה וְאֶחָד לַהֲפֹךְ אֶת סְדוֹם וְאֶחָד לְרַפְּאוֹת אֶת אַבְרָהָם, שֶׁאֵין מַלְאָךְ אֶחָד עוֹשֶׂה שְׁתֵּי שְׁלִיחֻיּוֹת (בראשית רבה).
והנה שלשה אנשים AND BEHOLD THREE MEN — one to announce to Sarah the birth of a son, one to overthrow Sodom, and one to cure Abraham, for one angel does not carry out two commissions (Genesis Rabbah 50:2).
מפני האורחין וכו׳: אמר רבי יוחנן גדולה הכנסת אורחין כהשכמת בית המדרש דקתני מפני האורחין ומפני בטול בית המדרש ורב דימי מנהרדעא אמר יותר מהשכמת בית המדרש דקתני מפני האורחין והדר ומפני בטול בית המדרש אמר רב יהודה אמר רב גדולה הכנסת אורחין מהקבלת פני שכינה דכתיב ויאמר (ה׳) אם נא מצאתי חן בעיניך אל נא תעבר וגו׳
We learned in the mishna: One may move baskets of produce due to the guests and in order to prevent the suspension of Torah study in the study hall. Rabbi Yoḥanan said: Hospitality toward guests is as great as rising early to go to the study hall, as the mishna equates them and teaches: Due to the guests and due to suspension of Torah study in the study hall. And Rav Dimi from Neharde’a says: Hospitality toward guests is greater than rising early to the study hall, as it teaches: Due to the guests, and only afterward: And due to suspension of Torah study in the study hall. Rav Yehuda said that Rav said on a related note: Hospitality toward guests is greater than receiving the Divine Presence, as when Abraham invited his guests it is written: “And he said: Lord, if now I have found favor in Your sight, please pass not from Your servant” (Genesis 18:3). Abraham requested that God, the Divine Presence, wait for him while he tended to his guests appropriately.
ונראה בעיני פשוט, שמכל שכן מצות הכנסת אורחים שהיא בכלל מצות עשה והלכת בדרכיו נוסף על שהיא מעלה גדולה ממעלות המדות, וזה לך האות שהאריכה התורה בסיפור הכנסת אורחים דאברהם אבינו, ורמזה לנו מענין שכרה שכל מה שעשה בעצמו לאורחים עשה הקב"ה בעצמו ובכבודו לבניו,
It is obvious to me that the מצוה of being hospitable to guests, (which is certainly included in the overall commandment to follow in G–d's footsteps), represents an additional virtue. The Torah has singled out this story of Abraham personally performing chores to entertain these strangers.
He took curds and milk and the calf that had been prepared and set these before them; and he waited on them under the tree as they ate.
ותצחק שרה, she assumed that the words of the angel were merely a blessing, not a prophecy, as occurred with the prophet Elisha. (Kings II 4,16) She believed that when such a blessing is given to old people, people who would require a miracle for the blessing to come true, it would not be effective in her case.
