Oklahoma constitution
Article XII: homestead and exemptions
Section 2

The homestead of the family shall be, and is hereby protected from forced sale for the payment of debts, except for the purchase money therefore or a part of such purchase money, the taxes due thereon, or for work and material used in constructing improvements thereon; nor shall the owner, if married, sell the homestead without the consent of his or her spouse, given in such manner as may be prescribed by law; Provided, Nothing in this article shall prohibit any person from mortgaging his homestead, the spouse, if any, joining therein; nor prevent the sale thereof on foreclosure to satisfy any such mortgage.