Musannaf Ibn Abi Shaybah 34407 — Reports on Abdullah bin Masud

Sayyiduna Ali (may Allah be pleased with him) said: The Messenger of Allah (peace and blessings be upon him) ordered Sayyiduna Ibn Mas'ud (may Allah be pleased with him) to climb a tree and bring something from it. The Companions of the Messenger of Allah (peace and blessings be upon him) (may Allah be pleased with them) looked at his thin shins and began to laugh. At this the Prophet (peace and blessings be upon him) said: "Why do you laugh? One leg of Abdullah bin Mas'ud (may Allah be pleased with him) will be heavier on the Scale than Mount Uhud."