Parashat Vayera includes Avraham's valiant effort to annul the divine decree of annihilation against the wicked city of Sedom. The Torah describes Avraham's intervention with the word, "vayigash," literally, "he approached" (18:23). Rashi there notes the various connotations of this word. One usage of the word appears in the parasha that opens with, and derives its name from, this word - Parashat Vayigash. There, as Rashi observes, "vayigash" implies an attempt at appeasement, as it depicts Yehuda's attempt to save Binyamin from Egyptian captivity.