Umm Musa said, "I heard 'Ali say that the Prophet, may Allah bless him and grant him peace, commanded 'Abdullah ibn Mas'ud to climb a tree and bring him something from it. His Companions looked at 'Abdullah's thigh and laughed at its thinness. The Messenger of Allah, may Allah bless him and grant him peace, said, 'Why are you laughing? 'Abdullah's foot is heavier in the balance than the mountain of Uhud.'"