Numbers 14:18

14:18 ‘The Lord is slow to anger and abounding in loyal love, forgiving iniquity and transgression, but by no means clearing the guilty, visiting the iniquity of the fathers on the children until the third and fourth generations.’

Numbers 35:27

35:27 and the avenger of blood finds him outside the borders of the town of refuge, and the avenger of blood kills the slayer, he will not be guilty of blood,