Kommentar zu Bereschit 18:2

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). You may know that this is so because throughout this section it (Scripture) mentions them in the plural — “and they ate” (Genesis 18:8), “and they said unto him” (Genesis 18:9) — whilst in the case of the announcement it states, (Genesis 18:10) “And he said, I will certainly return unto thee”, and with regard to the overthrow of Sodom it says (Genesis 19:22) “For “I” cannot do anything” and (Genesis 19:21) “that “I” will not overthrow [the city]”. Raphael who healed Abraham went thence to rescue Lot; that explains what is stated (Genesis 19:17) “And it came to pass when they had brought them forth, that he said, Escape for thy life”, for you learn from this that only one of these acted as Deliverer

וישא עיניו, he concentrated on seeing more clearly.

וישא עיניו וידא. When he raised his eyes he saw, etc. Why did the Torah add the word והנה?" Besides, why did the Torah add that the three men נצבים, "were standing?" This is no more than normal! What does the addition of that word add to our understanding? Furthermore, what is the meaning of the word עליו, "upon him?" The meaning of that word cannot be that they were merely close to Abraham! If that were the case, why did Abraham have to run towards them? Another difficulty in the paragraph is the repetition of the word וירא! Why does the Torah portray Abraham as bowing down to these men before he knew who they were, i.e. angels and not Arabs?