'Served' in the Bible

And when all the kings that were servants to Hadarezer saw that they were put to the worse before Israel, they made peace with Israel, and served them. So the Syrians feared to help the children of Ammon any more.

And again, whom should I serve?'should I not'serve in the presence of his son? as I have served in thy father's presence, so will I be in thy presence.