The Context

On the third day after his circumcision, Avraham sat outside his tent, looking for travelers to tend to. G-d revealed Himself to Avraham, to visit the sick. (Bereishis 18:1-2, Rashi) Three angels in the guise of men then appeared, and Avraham approached: “And he said, "My lord, if only I have found favor in your eyes, please do not pass on from beside your servant.” (Ibid, v.3)