Numbers 16:13

16:13 Is it a small thing that you have brought us up out of the land that flows with milk and honey, to kill us in the wilderness? Now do you want to make yourself a prince over us?

Numbers 35:21

35:21 or with enmity he strikes him with his hand and he dies, the one who struck him must surely be put to death, for he is a murderer. The avenger of blood must kill the murderer when he meets him.