Sayyiduna Ali bin Abi Talib (may Allah be pleased with him) narrated: I have preserved for you six things from the Prophet (peace and blessings be upon him): "The right to divorce exists only after marriage; freeing a slave is only after ownership; and a vow concerning disobedience is not fulfilled." (Allamah al-Haythami says:) I say: This narration in full will come in the chapter on divorce.
Imam al-Tabarani recorded it in al-Mu'jam al-Saghir, and its narrators are thiqat (trustworthy).