The covenants mentioned in 30-11-109 must be in substance as follows:
"The party of the first part covenants with the party of the second part that the party of the first part is now seized in fee simple of the property granted; that the party of the second part shall enjoy the property without any lawful disturbance; that the property is free from all encumbrances; that the party of the first part and all persons acquiring any interest in the property through or for the party of the first part will, on demand, execute and deliver to the party of the second part, at the expense of the party of the second part, any further assurance of the property that may be reasonably required; and that the party of the first part will warrant to the party of the second part all the property against every person lawfully claiming the property."
§ 30-11-110, MCA