Muhammad bin Ishaq (may Allah have mercy on him) narrates from a man of Madinah named Jahm, who narrates from Sayyiduna Ali (may Allah be pleased with him) that he appointed Abdullah bin Ja'far (may Allah be pleased with them both) as his agent in a dispute and said: In disputes there is ruin. Abu al-Zayyad said: "Qahm" refers to places of ruin.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الوكالة / 11438