If a husband compares his wife to his mother or another woman forbidden to him (mahram), their relationship becomes unlawful until kaffarah is paid:

1. Freeing a slave

2.If unable, fasting for two consecutive months

3.If unable, feeding 60 poor people

Reference (Qur’an): “Those who declare their wives to be like their mothers and then wish to return to them must free a slave before they touch each other. If they cannot afford it, they must fast for two consecutive months before touching each other. If they are unable, they must feed 60 poor people.” (Surah Al-Mujadalah: 3–4)