Okla. Stat. tit. 58, § 383

All petitions for orders of sale must be in writing, setting forth the facts showing the sale to be supported by good cause, and upon the hearing, any person interested in the estate may file his written objections, which must be heard and determined. A failure to set forth the facts showing the sale to be supported by good cause will not invalidate the subsequent proceedings, if the defect be supplied by the proofs at the hearing, and the general facts showing good cause be stated in the order directing the sale.