Deuteronomy 19:10

10 Innocent blood must not be spilled in the land the LORD your God is giving to you as an inheritance, or it will be bloodshed that will be required of you.

Deuteronomy 19:10 Meaning and Commentary

Deuteronomy 19:10

That innocent blood be not shed
As it would be if such a slayer as before described was killed by the avenger of blood, before he could get to one of these cities of refuge, or supposing that they had not bean appointed, or a sufficient number of them:

which the Lord thy God giveth thee for an inheritance;
to be enjoyed by them and their children after them, provided they did not defile it by their sins, but observed the commands of the Lord to obey them and

so blood be upon thee;
the guilt of innocent blood crying for vengeance, as would be the case if such a man's blood was shed as before described; it seems as if the guilt would rather affect the whole land, for not having a proper provision of "asylums" for such persons, than the avenger of blood.

Deuteronomy 19:10 In-Context

8 Now if the LORD your God enlarges your territory, as he swore to your ancestors—and he will give you all the land he swore to give to them

9 as long as you keep all this commandment that I am giving you right now by doing it, by loving the LORD your God, and by always walking in his ways—you can add three more cities for your use along with the first three.

10 Innocent blood must not be spilled in the land the LORD your God is giving to you as an inheritance, or it will be bloodshed that will be required of you.

11 But if someone does hate a neighbor and ambushes him, rising up against him and attacking him so he dies, and then escapes to one of these cities,

12 elders from the killer's hometown will send word, and the killer will be sent back from there. They will then hand him over to the blood avenger, and he will be executed.