English: “And wash your feet.” They said to him, “Do you suspect us of being Arabs who bow down to the dust of their feet? Yishmael has already gone forth from him.”
On the daf / in context: The angels protest Avraham’s request that they wash their feet, taking it as an implication that they might be idolaters who worship the dust on their feet; the Gemara notes that Yishmael’s line already existed.
Type of Learning
Derash on the verse (Bavli sugya) — not a formal named middah of the 13. The request to wash feet is read against the background of contemporary idolatrous practice.
What Is Learned
Avraham’s offer of water for the feet was understood by the angels as a precaution against possible idolatry; they protested that such suspicion was unfounded.