It is narrated from Ibrahim (may Allah have mercy on him) that when a man says to his wife: "I have given you to your family," they used to say: This is one divorce, but it is not known whether it is irrevocable (bainah) or revocable (raj‘i).
Hadith Referenceسنن سعید بن منصور / كتاب الطلاق / 2780