Deuteronomy 19:2

In the midst of thy land, to wit, beyond Jordan, as there were three already appointed on this side Jordan, Numbers 35:14. He saith, in the midst of the land, either for in the land, as in the midst of the city, Jeremiah 52:25, is the same with that in the city, 2 Kings 25:19, or to design the places, that they should be situated in the midst of the several parts of their land, to which they might conveniently and speedily flee from all the parts of the land.