Deuteronomy 4:42
that the manslayer might flee there, anyone who kills his neighbor unintentionally, without being at enmity with him in time past; he may flee to one of these cities and save his life:
Numbers 35:6
"The cities that you give to the Levites shall be the six cities of refuge, where you shall permit the manslayer to flee, and in addition to them you shall give forty-two cities.
Numbers 35:11-12
then you shall select cities to be cities of refuge for you, that the manslayer who kills any person without intent may flee there.
Numbers 35:15-28
These six cities shall be for refuge for the people of Israel, and for the stranger and for the sojourner among them, that anyone who kills any person without intent may flee there.
Deuteronomy 19:1-10
"When the LORD your God cuts off the nations whose land the LORD your God is giving you, and you dispossess them and dwell in their cities and in their houses,
Hebrews 6:18
so that by two unchangeable things, in which it is impossible for God to lie, we who have fled for refuge might have strong encouragement to hold fast to the hope set before us.