After the priest has the woman stand before the LORD, he is to let down her hair and place in her hands the grain offering of memorial, which is the grain offering for jealousy. The priest is to hold the bitter water that brings a curse.
Jewish Publication Society of America Version (JPS1917) - Numbers 5:18 >And the priest shall set the woman before the LORD, and let the hair of the woman's head go loose, and put the meal-offering of memorial in her hands, which is the meal-offering of jealousy; and the priest shall have in his hand the water of bitterness that causeth the curse.