Numbers 5:17-18

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

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