Numbers 5:17-18

17and the priest shall take holy water in an earthenware container; and 1he shall take some of the dust that is on the floor of the tabernacle and put it in the water.

18The priest shall then have the woman stand before the Lord and let down the hair of the woman’s head, and place the grain offering of reminder 2in her hands, that is, the grain offering of jealousy; and in the hand of the priest is to be the water of bitterness that brings a curse.