Sayyidina Ibn Abbas (RA) reported that Allah’s Messenger (SAW) said, “If you com across a man who has sexual intercourse with an animal then kill him and kill the animal with him.” Ibn Abbas .,- was asked, “What wrong had the animal done?” He said ‘I did not hear anything about it from Allah’s Messenger (SAW) but I suppose he did not like that one may eat its flesh or derive benefit from it, once this act was done with it.”
[Abu Dawud 4464]