'Apart' in the Bible

Then Moses set apart three cities across the Jordan to the east.

You must not bring any abhorrent thing into your house, or you will be set apart for destruction like it. You are to utterly detest and abhor it, because it is set apart for destruction.

“At that time the Lord set apart the tribe of Levi to carry the ark of the Lord’s covenant, to stand before Yahweh to serve Him, and to pronounce blessings in His name, as it is today.

Nothing set apart for destruction is to remain in your hand, so that the Lord will turn from His burning anger and grant you mercy, show you compassion, and multiply you as He swore to your fathers.

you are to set apart three cities for yourselves within the land the Lord your God is giving you to possess.

This is why I am commanding you to set apart three cities for yourselves.