Does a divorce take effect if the husband jokingly says, "Divorced today," with the immediate intention of taking her back, and he is not serious, and his wife is menstruating? And is the return permissible in this situation?

Divorce and revocation of divorce are equally valid whether uttered seriously or in jest. When a husband says, "You are divorced today," the divorce takes effect. The divorce of a menstruating woman is valid, according to the more authoritative opinion. The husband's intention not to effect the divorce is not taken into consideration. Revocation of divorce is valid even if it was done in jest.