Al-A'mash (may Allah have mercy on him) says: I asked Ibrahim (may Allah have mercy on him) about the fuller, and he said: He is liable.
Then it reached me that Hammad narrates from Ibrahim (may Allah have mercy on him) that he said: He is not liable. So I met him and said: By Allah, I do not know whether I ever saw you with Ibrahim or not! He said: Do not do this, O Abu Muhammad, for this distresses me. And Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الإجارة / 11670