Context 4:42 Anyone who accidentally killed someone1 without hating him at the time of the accident2 could flee to one of those cities and be safe.
[4:42]1tnHeb “the slayer who slew his neighbor without knowledge.”
[4:42]2tnHeb “yesterday and a third (day).” The point is that there was no animosity between the two parties at the time of the accident and therefore no motive for the killing.