I heard ʿAli ؓ say: The Prophet ﷺ instructed lbn Mas’ood to climb up a tree and he told him to bring him something from it, and his Companions looked at the shins of ‘Abdullah bin Masood when he climbed the tree and laughed at how thin his shins were, The Messenger of Allah ﷺ said: “Why are you laughing? The leg of ‘Abdullah will be heavier in the Balance on the Day of Resurrection than (Mount) Uhud.”
سَمِعْتُ عَلِيًّا يَقُولُ أَمَرَ النَّبِيُّ ﷺ ابْنَ مَسْعُودٍ فَصَعِدَ عَلَى شَجَرَةٍأَمَرَهُ أَنْ يَأْتِيَهُ مِنْهَا بِشَيْءٍ فَنَظَرَ أَصْحَابُهُ إِلَى سَاقِ عَبْدِ اللهِ بْنِ مَسْعُودٍ حِينَ صَعِدَ الشَّجَرَةَ فَضَحِكُوا مِنْ حُمُوشَةِ سَاقَيْهِ فَقَالَ رَسُولُ اللهِ ﷺ مَا تَضْحَكُونَ؟ لَرِجْلُ عَبْدِ اللهِ أَثْقَلُ فِي الْمِيزَانِ يَوْمَ الْقِيَامَةِ مِنْ أُحُدٍ