مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2408
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn 'Abbas (رضي الله عنه) that The Messenger of Allah (ﷺ) said: “Whoever has intercourse with an animal, kill him and kill the animal.”
Musnad Ahmad 2420Its isnad is a hasan]