ציטירנדיקער פּירוש אויף מלאכי 2:13

and they will quarrel with themselves Heb. וְנָקֹטוּ. Menachem associated it with (Ps. 119:158): “I saw traitors, and I quarreled (וָאֶתְקוֹטָטָה).” They will quarrel with themselves for not listening to Me. Jonathan renders: וְידַנְקוּן and they will see, and so does he translate (below 9:4): “those who groan (הַנֶאֶנָקִים),” דְּמִדַנְקִין, and (Mal. 2:13): “weeping...and groaning (וַאֲנָקָה),” דְּמִדַנְקָן, demonir in Old French, to groan.