(a) The petition for an order of sale of real property shall state the amount of the sales of personal property, the charges, expenses, and claims still unsatisfied, so far as the same can be ascertained, a description of the real property of the estate, the condition and probable value of the different portions or lots thereof, the amount and nature of any liens thereon, the names, ages, and residence of the devisees, if any, and of the heirs of the deceased, so far as known.
(b) Upon the filing of the petition a citation shall issue to the devisees and heirs therein mentioned and to all others unknown, if any such there be, to appear at a time therein mentioned, not less than thirty days after the service of such citation, to show cause, if any exist, why an order of sale should not be made as in the petition prayed for.