P arshas Lech Lecha “Then Avraham fell upon his face and laughed.” (Bereishis 17:17) We find the concept of tzechok laughter several times in the Torah. In parshas Vayeira (18:12) it says: “And Sarah laughed [vatitzchak] within herself.” Later (21:9) it says about Yishmael: “And Sarah saw the son of Hagar… mocking [metzacheik].” Each of