佛祖統紀 34.12

34.12

Riding a six-tusked white elephant, the bodhisattva departed from the Tuṣita palace, emitting a great illumination that shone universally throughout the ten directions. On the eighth day of the fourth month, at the time the bright morning star arose, he lowered his spirit into his mother's womb, entering from her right flank (Sūtra of Cause and Effect).