The Prophet (ﷺ) said: If any slave marries without the permission of his masters, he is a fornicator.
Sunan Abi Dawud Book 12, Hadith 33
← Previous Hadith The aforesaid tradition has also been transmitted by ‘Ali through a different chain of narrators from the Prophet (ﷺ) to the same effect.

Sunan Abi Dawud Book 12, Hadith 32 Next Hadith → 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.

Sunan Abi Dawud Book 12, Hadith 34