Genesis 9:6
Whoever sheds the blood of man, by man his blood will be shed; for in His own image God has made mankind.

Exodus 21:12-14
Whoever strikes and kills a man must surely be put to death. . . .

Numbers 35:33
Do not pollute the land where you live, for bloodshed pollutes the land, and no atonement can be made for the land on which the blood is shed, except by the blood of the one who shed it.

his servants

2 Kings 12:20, 21
And the servants of Joash rose up and formed a conspiracy and killed him at Beth-millo, on the road down to Silla. . . .

2 Chronicles 25:3, 4
As soon as the kingdom was firmly in his grasp, Amaziah executed the servants who had murdered his father the king. . . .