English: “And Hashem appeared to him.” From here we learn that it is the way of the Holy One, blessed be He, to visit the sick.
On the daf / in context: Sotah 14a derives from this verse that Hashem Himself came to visit Avraham after the circumcision, teaching that one must cleave to Hashem’s attributes by visiting the sick.
Type of Learning
Derash on the verse (Bavli sugya) — not a formal named middah of the 13. The appearance of Hashem after the milah is read as a visit to the convalescent.
What Is Learned
Visiting the sick is an imitation of Hashem’s own conduct: just as He appeared to Avraham while he recovered from circumcision, so we are obligated to visit the ill.