Deu 19:10 | KD | STEP | Innocent blood would be shed if the unintentional manslayer was not protected against the avenger of blood, by the erection of cities of refuge in every part of the land. If Israel neglected this duty, it would bring blood-guiltiness upon itself (“ and so blood be upon thee ”), because it had not done what was requisite to prevent the shedding of innocent blood.

‏ Deuteronomy 19:10

Innocent blood would be shed if the unintentional manslayer was not protected against the avenger of blood, by the erection of cities of refuge in every part of the land. If Israel neglected this duty, it would bring blood-guiltiness upon itself (“and so blood be upon thee”), because it had not done what was requisite to prevent the shedding of innocent blood.