In the hadith of Sayyiduna Uthman bin Affan (may Allah be pleased with him), the manner of the ablution of the Messenger of Allah (peace and blessings be upon him) has already passed: "Then he (peace and blessings be upon him) washed his right foot up to the ankles three times, then washed the left foot likewise."
And in this there is evidence that each foot has two ankles.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / Q357
Abu al-Qasim al-Jadali says: I heard Sayyiduna Nu'man bin Bashir (may Allah be pleased with him) saying: the Messenger of Allah (peace and blessings be upon him) turned his blessed face towards us and said three times: "Straighten your rows. By Allah, you will surely straighten your rows, or else Allah Almighty will put discord between your hearts." The narrator says: I saw a man pressing his ankle against the ankle of his companion, his knee against the knee of his companion, and his shoulder against his shoulder.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 357
Sayyiduna Tariq bin Abdullah al-Muharibi (may Allah be pleased with him) says: I saw the Messenger of Allah (peace and blessings be upon him) passing through the market of Dhu al-Majaz while I was selling my goods. He (peace and blessings be upon him) passed by wearing a red garment, and I heard him (peace and blessings be upon him) saying: "O people, say 'La ilaha illallah' (there is no god worthy of worship except Allah) and you will succeed." And a man was following behind him (peace and blessings be upon him), throwing stones at him; he had made his (peace and blessings be upon him) ankles bleed. That was Abu Lahab.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 358