Musannaf Ibn Abi Shaybah

Hazrat Yahya bin Saeed narrates that Hazrat Saeed bin Musayyib said: Among the people of Syria, there was a man named Ibn Khaibri. He found a man with his wife, so he killed his wife or both of them. This matter was presented before Hazrat Muawiyah, and it became difficult for him to make a decision regarding it. He wrote a letter to Hazrat Abu Musa to ask Hazrat Ali (may Allah be pleased with him) about this matter. Then Hazrat Abu Musa inquired from Hazrat Ali (may Allah be pleased with him). He said: Indeed, this matter has not occurred in our land. I adjure you to surely inform me about it. So Hazrat Abu Musa informed him about the matter. Then Hazrat Ali (may Allah be pleased with him) said: If he does not bring four witnesses, then you should hand him over completely.