2 Samuel 6:17

6:17 They brought the ark of the Lord and put it in its place in the middle of the tent that David had pitched for it. Then David offered burnt sacrifices and peace offerings before the Lord.

2 Samuel 24:24

24:24 But the king said to Araunah, “No, I insist on buying it from you! I will not offer to the Lord my God burnt sacrifices that cost me nothing.”

So David bought the threshing floor and the oxen for fifty pieces of silver.