TT #10 · Parashas Vayeira · Passuk 18:4
Let a little water be brought, and wash your feet, and recline under the tree.
Torah Temimah points to Bava Metzia 86b. E-Daf · Sefaria — Bava Metzia 86b
TT lemma: יקח נא.
“Let a little water be brought…” Rav Yehudah said in the name of Rav: Whatever Avraham did for the angels himself, the Holy One, blessed be He, later did for his children Himself; and whatever he did through an agent, the Holy One, blessed be He, later did for his children through an agent.
Derash on the verse (Bavli sugya) — not a formal named middah of the 13. Each detail of Avraham’s service is paired with a later divine response in kind.
Hashem repaid Avraham’s hospitality measure for measure: what Avraham did personally, Hashem did personally for Israel; what Avraham delegated, Hashem delegated.