Numbers 5:23

And the priest shall write these curses in a book
The above curses imprecated on herself by an oath; the words and the letters of them were written at length, in a scroll of parchment; and, as some say also, her name, but not her double amen to them ^F25: and he shall blot [them] out with the bitter water:
wash them out with it, and into it, or scrape them off of the parchment into it.

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FOOTNOTES:

F25 Misnah, ut supra, (Sotah, c. 2) sect. 3.