Is it permissible for a person to give his freedom to someone and say to him, “I am your slave”?

Question:
What is the ruling on a woman who says, “I have given myself to you, I am your right-hand possession,” knowing that she is not owned by anyone and is free in herself? Is she entitled to give herself to a man?

Answer:
No, it is not permissible for a free person to enslave himself. The Prophet (peace and blessings be upon him) said: , and among them he mentioned the one who enslaved a free person. Whoever enslaves a free person and eats the price of him, it is not permissible to enslave free people except through the lawful means: jihad in the path of Allah, when the Muslims take possession of the children and women of the polytheists in jihad, they are made slaves. As for anything other than that, enslavement is not permissible. It is not permissible for anyone to give his freedom to a person and say, “I am your slave” or “I am your slave,” this is forbidden. It is forbidden for him and forbidden for the person who accepts this, and they are threatened with severe punishment.
Yes, but if she gives herself to him in marriage and chooses him as her husband, and her guardian contracts the marriage for her, there is no harm.