It is narrated from Sayyiduna Ali (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "If I were to appoint someone as a leader over the Muslims without consulting them, I would appoint Ibn Umm Abd, that is, Sayyiduna Ibn Mas'ud (may Allah be pleased with him)."
Hadith Referenceمسند احمد / مسند الخلفاء الراشدين / 566
Hadith Gradingحکم دارالسلام:إسناده ضعيف لضعف الحارث الأعور