من لا يحضره الفقيه, volume 3, page 446

Hadith.4547 - Al-Alaa narrated from Muhammad ibn Muslim, who said: I asked him about a man who purchased a bondwoman and her previous owner had not had relations with her. Should he still observe an istibra' (waiting period) for her womb? Imam (as) said: "Yes." I asked: "What about a bondwoman who has not yet menstruated? What should he do with her?" Imam (as) said: "Her matter is more severe. If he has relations with her, he must not ejaculate until it becomes clear whether she is pregnant or not." I asked: "How long will it take for this to become clear?" Imam (as) said: "In forty-five nights."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.4548 - Musa ibn Bakr narrated from Zurara, who said: I asked Abu Jafar Imam Muhammad ibn Ali Al-Baqir (as) about a man whose slave married a woman without his permission and then consummated the marriage. Later, the master found out about it. Imam (as) said: "It is up to the master - if he wishes, he can separate them, and if he wishes, he can approve their marriage. If the master separates them, the woman is entitled to whatever dowry was given to her unless it was excessive, in which case it is reduced. But if the master approves their marriage, they remain upon their original marriage contract." I then said to Abu Jafar Imam Muhammad ibn Ali Al-Baqir (as): "Was the slave sinful in entering into the marriage without permission in the first place?" Abu Jafar Imam Muhammad ibn Ali Al-Baqir (as) replied: "What he did was something permissible and lawful; he did not disobey Allah (swt), the Mighty and Majestic. Rather, he disobeyed his master but did not violate any law of Allah (swt). This is not like committing something forbidden by Allah (swt), such as marrying a woman who is in her waiting period or similar acts."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.