Deuteronomy 12:9-11

Do you see what God was doing? He was organizing a national religion that had one headquarters, and it was there the offerings had to be made.

God is talking about the building of His house wherein He dwelt—the tabernacle. When the tabernacle was erected, then God inhabited it, and then they would bring the offerings to Him there, not out in some field right inside the border. They had to wait until God designated a place through the leader (probably Joshua) as to where that place was going to be.

Deuteronomy 12:1-10

As we just read there in the book of Deuteronomy 12:8-9, Moses told the people, "You shall not do as we are doing here today—every man doing what is right in his own eyes," as they crossed over into the Jordan. From that point forward, they should have been coming into the place of rest. They should have been finding the peace that God would give them, which comes with His blessing in the land of promise and peace for those who would obey His voice. It was truly the land of peace that comes from living the Word of God.