Mo. Rev. Stat. § 535.050
Current with changes from the 2023 Legislative Session
When the property is held by a written lease containing a clause declaring the lease forfeited for the nonpayment of rent for a specified time, no process shall issue against the lessee or other person occupying the premises, until the expiration of said specified time.
§ 535.050, RSMo
RSMo 1939 § 2997