וְשָׁמַעְתָּ֙ מִן־הַשָּׁמַ֔יִם אֶת־תְּפִלָּתָ֖ם וְאֶת־תְּחִנָּתָ֑ם וְעָשִׂ֖יתָ מִשְׁפָּטָֽם׃
tu entendras du ciel leur voix suppliante, et tu leur feras justice.
Rashi on II Chronicles
and maintain their cause their revenge from their enemies. Another meaning is: their necessities. A similar instance is (I Kings 8:59): “that He sustain the cause of His servant.”