Hadith 8:3257
Abu Bakr narrated to us, he said: Mu'tamir narrated to us, from Ibn 'Awn, from al-Hasan, he said: Regarding every animal that has a rumen (stomach), [the expiation is] a sheep.
حدثنا أبو بكر قال نا معتمر عن بن عون عن الحسن قال في كل ذات كرش شاة