Answers (1)
During Jacob’s grappling with an angel, the angel touched the socket of Jacob’s thigh joint, causing it to get out of place. The account written later by Moses says: “That is why the sons of Israel are not accustomed to eat the sinew of the thigh nerve, which is on the socket of the thigh joint, down to this [Moses’] day, because he touched the socket of Jacob’s thigh joint by the sinew of the thigh nerve.” (Ge 32:32) Many Jews still adhere to this custom, removing the sciatic nerve together with arteries and tendons before eating the animal. This precept is considered by some Jewish commentators a reminder of God’s providence to Israel as exemplified in the experience of the patriarch Jacob, father of the 12 tribes.
Other Jewish customs are:
Yarmulke (skullcap for males)—According to the Encyclopaedia Judaica: “Orthodox Jewry . . . regards the covering of the head, both outside and inside the synagogue, as a sign of allegiance to Jewish tradition.” Covering the head during worship is nowhere mentioned in the Tanakh, thus the Talmud mentions this as an optional matter of custom. Hasidic Jewish women either wear a head covering at all times or shave their heads and wear a wig.
Circumcision—For Jewish boys, it is an important ceremony that takes place when the baby is eight days old. It is often called the Covenant of Abraham, since circumcision was the sign of God’s covenant with him. Males who convert to Judaism must also be circumcised.—Genesis 17:9-14.
▪ Bar Mitzvah —Another essential Jewish ritual, which literally means “son of the commandment,” a “term denoting both the attainment of religious and legal maturity as well as the occasion at which this status is formally assumed for boys at the age of 13 plus one day.” It became a Jewish custom only in the 15th century C.E.