"This is the law of jealousy, when a wife, while under her husband's authority, goes astray and defiles herself,
Numbers 5:29
Surrounding context
5:28 But if the woman has not defiled herself, and is clean, then she shall be free and may conceive children.
5:29 "This is the law of jealousy, when a wife, while under her husband's authority, goes astray and defiles herself,
5:30 or when the spirit of jealousy comes upon a man, and he becomes jealous of his wife; then he shall stand the woman before the LORD, and the priest shall execute all this law upon her.