Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said that the Prophet (peace and blessings be upon him) sent out an army and appointed Sayyiduna Usamah (may Allah be pleased with him) as its commander. The people disliked his leadership and criticised it, so the Prophet (peace and blessings be upon him) said: "You are criticising his leadership; this is nothing new, for before this you did the same regarding his father. By Allah! He is most deserving of leadership; his father was the most beloved of all people to me, and now after him this one is the most beloved to me."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قتال أهل البغي / 16598