Numbers 19:15-17

Young's Literal Translation

¹⁵ and every open vessel which hath no covering of thread upon it is unclean.

¹⁶ `And every one who cometh, on the face of the field, against the pierced of a sword, or against the dead, or against a bone of man, or against a grave, is unclean seven days;

¹⁷ and they have taken for the unclean person of the ashes of the burning of the [cleansing], and he hath put upon it running water unto a vessel;