Genèse 19:3

And he persuaded them earnestly, and they turned aside to be with him; and they entered his house, and he made a repast for them, and prepared unleavened cakes. And it seemed to him as if they did eat.

AND HE URGED THEM GREATLY. His urging them was meritorious on the part of Lot, and he indeed had a sincere desire to welcome wayfarers. They, however, at first refused in order to increase his merit, and therefore they finally listened to him; but originally they did not want to come into his house as he was not a perfectly righteous man. But our Rabbis have said [in order to explain their original refusal]: “One may decline an offer from an inferior person, but not from a superior person.”, (above, 18:5), but with Lot, they at first declined. If so, their declining his offer at first was merely an act of ethical conduct.

משתה, seeing that Lot loved wine, he made the kind of meal which was secondary to the drinking of wine. The veiled reference to wine in this verse, becomes clearer when we encounter the daughters of Lot making him drunk on wine in 19,33. On the other hand, the only time Avraham prepared the kind of feast in which wine was featured, was on the occasion when he weaned his son Yitzchok in Genesis 21,8. On that occasion, when he entertained the leading personalities of his time, people used to indulging in wine, he served them what they expected to be served. Our sages in Sotah 10 approve of such a procedure.

ויפצר בם מאד, he spoke to them intently on the subject, urging them to accept his invitation, until eventually, they did come to his house. Onkelos writes ותקיף בהם, that he actually took hold of these men until they concurred to spend the night with him.

ויעש להם משתה, seeing it was night he did not have time to slaughter an animal in their honour, but he prepared something at short notice, served them drinks, and unleavened bread which can be prepared at short notice. It is good manners to prepare something at short notice for guests who arrived unexpectedly. The guest arriving at such a time is usually tired and does not care to wait until an elaborate meal can be prepared in his honour. The story has been recorded for all times in order to teach us how to serve unexpected guests arriving at night.

ויאכלו. If the whole sequence is a vision which Lot did not actually experience, the meaning of the word ויאכלו must be understood literally; if the Torah describes actual events, the word means that Lot had the impression as if the angels ate and drank his food. The food and drink, which are composed of different components, simply dissolved into their basic ingredients so that they were not visible as such. [imagine water, i.e. H20, being dissolved into the gases oxygen and hydrogen, becoming invisible in the process. Ed.] This, of course, would occur miraculously.