Numbers 5:15-17

Amplified Bible

¹⁵ then the man shall bring his wife to the priest, and he shall bring as an offering for her, a tenth of an ephah of barley meal; he shall not pour oil on it nor put frankincense on it [the symbols of favor and joy], because it is a grain offering of jealousy, a memorial grain offering, a reminder of [the consequences of] wickedness.

¹⁶ ‘Then the priest shall have her approach and have her stand before the Lord, ¹⁷ and the priest shall take holy water [from the sacred basin] in an earthenware vessel; and he shall take some of the dust that is on the floor of the tabernacle and put it in the water.