Musannaf Ibn Abi Shayba 18:175

Abu Bakr narrated to us, he said: Umar bin Ali bin Ata bin Muqaddam narrated to us, from Hajjaj, from Makhul, from Zayd bin Thabit, regarding a man who claims that his hearing has gone: He said, "He is to be made to swear an oath regarding it."