Hadith 1455
And Sufyan Thawri narrated via: «عاصم عن أبي رزين عن ابن عباس» (as a mawquf narration), he says: There is no prescribed punishment (hadd) for one who has intercourse with an animal («وطی»). This hadith was narrated to us by Muhammad bin Bashar with the chain «عبدالرحمٰن بن مهدي حدثنا سفيان الثوري», and it is more authentic than the first hadith 1؎.
2- The scholars act upon this 2؎, and this is also the opinion of Ahmad and Ishaq bin Rahwayh.