Hadith.4857 - Al-Hasan ibn Ali Al-Kufi narrated from Al-Husayn ibn Saif, from Muhammad ibn Sulayman, from Abu Ja'far Al-Thani عليه السلام, who said: I asked him: "May I be sacrificed for you, why is it that when a man accuses his wife of adultery, his testimony consists of four oaths by Allah سبحانه وتعالى, but if someone else, such as a father, brother, son, or even a stranger - accuses her, he is subjected to the ḥadd punishment unless he provides clear evidence for his claim?" Imam عليه السلام replied: " Imam Jafar ibn Muhammad Al-Sadiq عليه السلام was asked the same question and said: 'If a husband accuses his wife and claims, "I saw it with my own eyes," his testimony is four oaths by Allah سبحانه وتعالى. However, if he says he did not see it himself, he is told to bring evidence for his claim, and if he fails, he is treated like anyone else.' This is because Allah سبحانه وتعالى, the Almighty, has given the husband a special access to his wife that no one else has-neither a father, a son, nor anyone else. He has access to her day and night, so it is valid for him to say, 'I saw.' But if anyone else were to say, 'I saw,' it would be said to him, 'How did you have access to such a place to witness this alone? You are under suspicion and must be subjected to the ḥadd punishment that Allah سبحانه وتعالى has prescribed for you.'"