[Mutual Imprecation]
578—As for mutual imprecation, if a man accuses his wife of adultery, he is liable to the prescribed punishment for an unsubstantiated accusation of adultery—eighty lashes—unless:
A—He establishes legal proof by producing four upright witnesses, in which case the prescribed punishment is carried out on her; or
B—He undertakes mutual imprecation, in which case the prescribed punishment for the accusation is waived for him.
579—The procedure for mutual imprecation is as Allah described in Surat al-Nūr: “Those who accuse their wives…” to the end of the verses [al-Nūr: 6–9].
A—The husband testifies five times by Allah that she has indeed committed adultery, saying on the fifth: “May Allah’s curse be upon him if he is among the liars.”
B—She then testifies five times by Allah that he is indeed among the liars, saying on the fifth: “May Allah’s wrath be upon her if he is among the truthful.”
580—Once the mutual imprecation is complete:
A—The prescribed punishment is waived for him;
B—The punishment is averted from her,