«وَنَهْنِهِي عَنْ غَرْبِكِ وَسَلِّي لِقَضَاءِ رَبِّكِ»
Temper the sharpness of your speech and find comfort in your Lord’s decree.
Gharb can denote an edge or sharpness; here it evokes sharp speech. Nahnihī and sallī are feminine imperatives directed to the wife.
The judge attempts to bring the dispute to a calmer close, using counsel rather than adding further accusations.