As for what was narrated by Muhammad ibn Ahmad ibn Yahya, from Ahmad ibn Muhammad, from Dawud al-Sarmi, who said:
I asked him about prayer in khazz that is lined with rabbit fur. And he wrote in reply: "That is permissible."
Ali Akbar al-Ghaffari
Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 226