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.
Read halakhic rulings (Jewish law) on Psalms 35:1: and classical halakhic sources.