Okla. Stat. tit. 58 § 485
When any sale is made by an executor or administrator, pursuant to the provisions of this chapter, of lands subject to any mortgage or other lien, which is a valid claim against the estate of the decedent and has been presented and allowed, the purchase money must be applied, after paying the necessary expenses of the sale, first to the payment and satisfaction of the mortgage or lien, and the residue, if any, in due course of administration. The application of the purchase money to the satisfaction of the mortgage or lien must be made without delay; and the land is subject to such mortgage or lien until the purchase money has been actually so applied. No claim against any estate which has been presented and allowed is affected by the statute of limitations, pending the proceedings for the settlement of the estate. The purchase money, or so much thereof as may be sufficient to pay such mortgage or lien, with interest, and any lawful costs and charges thereon, may be paid into the district court, to be received by the judge thereof, whereupon the mortgage or lien upon the land must cease, and the purchase money must be paid over by the judge without delay, in payment of the expenses of the sale and in satisfaction of the debt, to secure which the mortgage or other lien was taken, and the surplus, if any, at once returned to the executor or administrator, unless, for good cause shown, after notice to the executor or administrator, the judge otherwise directs.
Okla. Stat. tit. 58, § 485