לְדָוִ֨ד ׀ רִיבָ֣ה יְ֭הוָה אֶת־יְרִיבַ֑י לְ֝חַ֗ם אֶת־לֹֽחֲמָֽי׃
[A Psalm] of David. Strive, O LORD, with them that strive with me; Fight against them that fight against me.
Rashi on Psalms
O Lord, strive with those who strive against me Make a quarrel with those who make quarrels with me.
Rashi on Psalms
battle Heb. לחם an expression of war (מלחמה), and so לחמי, battle those who battle with me.