Isa bin Mina' Qalun says: I recited this reading to Nafi' bin Abd al-Rahman bin Abi Nu'aym, the Qur'an reciter, several times; he too recited "your heads and your feet (bi-ru'usikum wa arjulakum)" [Surah al-Ma'idah: 6] in the accusative.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 336