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." (DE)
English reference (DE): Vol. 3, Book 21, Hadith 2663 (DE)
Arabic reference (DE): Book 21, Hadith 2765 (DE)