It is narrated from Abu Waqid Al-Laithi that a man came to Sayyiduna Umar (may Allah be pleased with him) while he was in Syria. The man stated that he had found a man with his wife. Umar sent Abu Waqid to go and ask the woman. He went to the woman, and there were other women sitting with her. They said to her what her husband had reported to Sayyiduna Umar (may Allah be pleased with him), and also told her that she would not be held accountable just because her husband said so. They began to teach her such things so that she would not confess, but she did not accept and confessed to adultery. Sayyiduna Umar (may Allah be pleased with him) ordered her to be stoned, and she was stoned. (It is understood from this that a person is held accountable for what he confesses to himself.)