English: “A calf…” Rav Yehudah said in the name of Rav: “A calf” is one; “tender” is two; “and good” is three. Why three when one would suffice? Rav Chanan bar Rava said: In order to feed them three tongues with mustard.
On the daf / in context: The three descriptors are counted as three separate animals so that each guest could be served a tongue prepared with mustard, a delicacy.
Type of Learning
Derash on the verse (Bavli sugya) — not a formal named middah of the 13. The multiple adjectives are read as indicating multiple animals.
What Is Learned
Avraham took three calves so that each of the three guests could be served a tongue with mustard.