民數記 19:10

收起母牛灰的人必不潔淨到晚上，要洗衣服。這要給以色列人和寄居在他們中間的外人作為永遠的定例。」

And he that gathereth the ashes of the heifer shall wash his clothes, and be unclean until the even: and it shall be unto the children of Israel, and unto the stranger that sojourneth among them, for a statute for ever.