mitzvah
2.He moved back to Princeton, where students knew him only as the Phantom, a mute figure who scribbled weird but witty messages on blackboards: Mao Tsetung's bar mitzvah was 13 years, 13 months and 13 days after Brezhnev's circumcision.
3.To explore the section of folk songs in Classic of Poetry , especially the distinguished part Guofeng , we can see that its contents are mainly about the common senses of nature and everyday life, the skills of production and work ,the methods of mitzvah and cultivation and the principles of adoration and sacrifice.

