صحيح ابن خزيمه
Sahih Ibn Khuzaymah
جماع أبواب الوضوء وسننهChapters on Wudu and its Sunnahs
( 124) بَابُ ذِكْرِ الدَّلِيلِ عَلَى أَنَّ الْكَعْبَيْنِ اللَّذَيْنِ أُمِرَ الْمُتَوَضِّئُ بِغَسْلِ الرِّجْلَيْنِ إِلَيْهِمَا الْعَظْمَانِ النَّاتِئَانِ فِي جَانِبَيِ الْقَدَمِ لَا الْعَظْمُ الصَّغِيرُ النَّاتِئُ عَلَى ظَهْرِ الْقَدَمِ، عَلَى مَا يَتَوَهَّمُهُ مَنْ يَتَحَذْلَقُ مِمَّنْ لَا يَفْهَمُ الْعِلْمَ، وَلَا لُغَةَ الْعَرَبِ.Chapter 124: Evidence that the ankles to be washed are the protruding bones on the sides of the foot, not the small bone on top
Hadith 158
نا يُونُسُ بْنُ عَبْدِ الأَعْلَى الصَّدَفِيُّ ، نا ابْنُ وَهْبٍ ، أَخْبَرَنِي يُونُسُ ، عَنِ ابْنِ شِهَابٍ ، عَنْ عَطَاءِ بْنِ يَزِيدَ أَخْبَرَهُ ، أَنَّ حُمْرَانَ أَخْبَرَهُ ، أَنَّ عُثْمَانَ دَعَا يَوْمًا وَضُوءًا ، فَذَكَرَ الْحَدِيثَ فِي صِفَةِ وُضُوءِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ ، وَقَالَ : " ثُمَّ غَسَلَ رِجْلَهُ الْيُمْنَى إِلَى الْكَعْبَيْنِ ثَلاثَ مَرَّاتٍ ، وَالْيُسْرَى مِثْلَ ذَلِكَ " . قَالَ أَبُو بَكْرٍ : فِي هَذَا الْخَبَرِ دَلالَةٌ عَلَى أَنَّ الْكَعْبَيْنِ هُمَا الْعَظْمَانِ النَّاتِئَانِ فِي جَانِبَيِ الْقَدَمِ ، إِذْ لَوْ كَانَ الْعَظْمُ النَّاتِئُ عَلَى ظَهَرِ الْقَدَمِ ، لَكَانَ لِلرِّجْلِ الْيُمْنَى كَعْبٌ وَاحِدٌ لا كَعْبَانِ
Hazrat Humran (may Allah have mercy on him) narrates that one day Sayyiduna Uthman (may Allah be pleased with him) asked for water, then he narrated the hadith regarding the method of ablution of the Prophet (peace be upon him), and said that then he washed his right foot up to both ankles three times, and washed his left foot in the same way. Imam Abu Bakr (may Allah have mercy on him) says that this hadith is evidence that the ankles are the two protruding bones on both sides of the foot, because if by "ankle" was meant the bone protruding on top of the foot, then the right foot would have only one ankle, not two.
