Deuteronomy 4:42

42 to which someone who had unintentionally killed a person could flee and find refuge. If the murder was unintentional and there was no history of bad blood, the murderer could flee to one of these cities and save his life:

Deuteronomy 4:42 Meaning and Commentary

Deuteronomy 4:42

That the slayer might flee thither
For refuge; the slayer of a man, but not any slayer, but

which should kill his neighbour unawares;
by accident to him, without any design and intention to kill him; ignorantly, as the Septuagint version; and so Onkelos:

and hated him not in times past;
it having never appeared that there had been a quarrel between them, and that the slayer had shown any enmity to the man slain any time before the fact, or bore a grudge against him, or spite unto him:

and that, fleeing unto one of these cities, he might live;
in peace and safety unto his own death, or unto the death of the high priest, when he was released from his confinement to the city of his refuge, and might return to his tribe, house, family, and possessions.

Deuteronomy 4:42 In-Context

40 Obediently live by his rules and commands which I'm giving you today so that you'll live well and your children after you - oh, you'll live a long time in the land that God, your God, is giving you.

41 Then Moses set aside three towns in the country on the east side of the Jordan

42 to which someone who had unintentionally killed a person could flee and find refuge. If the murder was unintentional and there was no history of bad blood, the murderer could flee to one of these cities and save his life:

43 Bezer in the wilderness on the tableland for the Reubenites, Ramoth in Gilead for the Gadites, and Golan in Bashan for the Manassites.

44 This is the Revelation that Moses presented to the People of Israel.