Okla. Stat. tit. 12, § 12-1146
New trial in action to recover real property
In all actions for the recovery of real property one trial only
shall be granted as a matter of right, but the party against whom
the judgment is rendered may secure a new trial in the same manner
and for the same reasons as new trials are awarded in other civil
cases.
R.L. 1910, § 4932.