The Book of Purification
وَحَدَّثَنِي الْقَاسِمُ بْنُ زَكَرِيَّاءَ، حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ، عَنْ سُلَيْمَانَ، - هُوَ ابْنُ بِلاَلٍ - عَنْ عَمْرِو بْنِ يَحْيَى، بِهَذَا الإِسْنَادِ نَحْوَهُ وَلَمْ يَذْكُرِ الْكَعْبَيْنِ .This hadith is narrated by Amr b. Yahya with the same chain of transmitters, but there is no mention of ankles
From Sahih Muslim, whose reports the scholars accept as authentic.