The three travelers had finished their meal under the terebinths. They rose, and the Targum watches them split off into three different errands. The one who had come to announce a son to Sarah had already finished his task, and he ascended back to the high heavens. The other two turned their faces toward Sedom. And Abraham, who could not let them go alone, walked out with them on the road (Genesis 18:16).
The Aramaic paraphrase in Targum Pseudo-Jonathan makes explicit what the Hebrew only hints at: each angel has exactly one mission. Announcement, rescue, destruction — three tasks, three messengers. The rabbis read this as a foundational rule of the angelic economy. No angel is dispatched for two errands at once.
But notice what Abraham does. He has just hosted divine messengers, fed them, and received a promise about Isaac. Most hosts would settle back into their tent. Abraham does not. He walks with them, because the direction they are walking is toward a city full of human beings about to be judged. He will not let the judgment go unchallenged without at least standing on the road beside the ones who carry it.
The takeaway is small and sharp: hospitality does not end at the table. It follows the guest down the road, and sometimes it walks toward the fire.