It was narrated from Samurah bin Jundab that the Messenger of Allah (ﷺ) said:
"Whoever kills his slave, we will kill him, and whoever mutilates (his slave) we will mutilate him." (ES)
English reference (ES): Vol. 3, Book 21, Hadith 2663 (ES)
Arabic reference (ES): Book 21, Hadith 2765 (ES)