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.
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