Fudayl Ibn ‘Iyaad (may Allah have mercy upon him) stated:

I swear by Allah it’s not permissible for you to harm a dog or a pig without right. Therefore, how can you harm a Muslim?!

Source: Siyar ‘Alaam an-Nubalaa, V.7 pg. 396

Translated by: Abu Yusuf Khaleefah
4th of Muharram, 1436 (27th of October, 2014)
Masjid Nur Allah, LeFrak City, Corona, NYC

Original Arabic