John Gill Commentary 2 Samuel 22:44

"Thou also hast delivered me from the strivings of my people; Thou hast kept me to be the head of the nations: A people whom I have not known shall serve me." — 2 Samuel 22:44 (ASV)

You also have delivered me from the strivings of my people ,
you have kept me head of the heathen: a people I knew
not shall serve me.] (See Gill on Psalms 18:43).