TSK · Numbers 35:12

The avenger of blood shall himself put the murderer to death: when he meets him, he shall put him to death.

lest the avenger of blood pursue the manslayer, while his heart is hot, and overtake him, because the way is long, and strike him mortally; whereas he was not worthy of death, inasmuch as he didn't hate him in time past.

that the manslayer who kills any person accidentally or unintentionally may flee there. They shall be to you for a refuge from the avenger of blood.

Behold, the whole family has risen against your handmaid, and they say, 'Deliver him who struck his brother, that we may kill him for the life of his brother whom he killed, and so destroy the heir also.' Thus they would quench my coal which is left, and would leave to my husband neither name nor remainder on the surface of the earth."