Hadith 2078
Narrated Jabir ibn Abdullah: The Prophet ﷺ said: If any slave marries without the permission of his masters, he is a fornicator.
Hadith 2079
Ibn Umar reported the Prophet ﷺ as saying “If a slave marries without the permission of his master, his marriage is null and void. Abu Dawud said “This tradition is weak. This is mauquf (does not go back to the Prophet). This is the statement of the Ibn Umar himself.