Bar and Bat Mitzvah to the event. However, this does not delay the onset of rights and responsibilities of being a Jewish adult which comes about strictly by virtue of age. The obligation to lay tefillin begins when a boy reaches bar mitzvah age. The common custom is for the bar mitzvah boy to begin putting on tefillin one to three months before his bar mitzvah. This way, by the time he is obligated in the commandment, he will already know how to fulfill it properly. The first mention of a party associated with a synagogue bar mitzvah was in the 13th century, so
Mitzvah goreret mitzvah is by habit, in which a person becomes accustomed to performing a mitzvah regularly. The contrast to this belief is called "aveira goreret aveira" in which the commission of an "aveira" (sin) leads to another sin. The phrase has often been used in songs for children to encourage the performance of good works. One popular song, written by Andy Vogel in 1986, was recorded on the Reform Jewish movement's "NFTY at 50" album, and is widely sung in the Reform Jewish movement. Mitzvah goreret mitzvah The Hebrew phrase mitzvah goreret mitzvah, averah goreret averah (Hebrew: מצווה גוררת מצווה; עברה גוררת