Thabit narrates: I was sitting with Abd al-Rahman bin Abi Layla when a heavily built man came and said: Are you Abu Isa? He replied: Yes. The man said: Narrate to us the hadith you have heard about hides. He said: I heard my father say: Once I was sitting with the Prophet (peace and blessings be upon him) when a man came and asked: O Messenger of Allah! May I pray in hide? The Prophet (peace and blessings be upon him) said: Then where would the tanning go?
Imam Ahmad recorded this narration; its chain contains a narrator, Muhammad bin Abd al-Rahman bin Abi Layla, who has been criticised for his poor memory, while Abu Hatim declared him "thiqah" (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الطهارة / 1093