七佛八菩薩所說大陀羅尼神呪經 4.146

4.146

三升水銅瓫盛，以白練副上，以七枚楊枝縱橫安上，呪三七遍，用竟棄之廁中。

Place three sheng of water in a bronze basin, cover it with white silk, place seven willow twigs across it crisscross, empower it with the spell three times seven times, and when finished using it, discard it in the privy.