"During the time of the Messenger of Allah (swt) (peace be upon him and his family), there was a man named Aws ibn Al-Samit who was married to a woman named Khawlah bint Tha'labah. One day, he said to her: 'You are to me as the back of my mother.' He immediately regretted his words and said to her: 'O woman, I think you have become unlawful for me.' Khawlah went to the Messenger of Allah (swt) (peace be upon him and his family) and said: 'O Messenger of Allah (swt), my husband said to me, "You are to me as the back of my mother." This statement in the past used to make a wife unlawful for her husband.' The Messenger of Allah (swt) (peace be upon him and his family) said to her: 'O woman, I think you have indeed become unlawful for him.' She then raised her hands to the sky and said: 'I complain to You (swt) about the separation from my husband.' Allah (swt), the Mighty and Majestic, revealed: 'Indeed, Allah (swt) has heard the statement of the woman who disputes with you concerning her husband and complains to Allah (swt). And Allah (swt) hears your dialogue; indeed, Allah (swt) is All-Hearing, All-Seeing. Those among you who declare their wives unlawful to them (by ẓihar) are not their mothers. Their mothers are none but those who gave birth to them. And indeed, they utter an evil statement and a falsehood. But indeed, Allah (swt) is Pardoning and Forgiving'" (Surah Al-Mujadilah 58:1-2). Then Allah (swt), the Mighty and Majestic, revealed the expiation for this, saying: 'And those who pronounce ẓihar from their wives and then wish to go back on what they said, must free a slave before they touch one another. This is what you are admonished with, and Allah (swt) is All-Aware of what you do. But whoever does not find [a slave to free] must fast for two consecutive months before they touch one another. And whoever is unable must feed sixty poor people'" (Surah Al-Mujadilah 58:3-4).