'Bought' in the Bible

But the poor man had nothing but one little ewe lambWhich he had purchased and nourished;And it grew up together with him and his children.It ate his food, drank from his cup, it lay in his arms,And was like a daughter to him.

But the king said to Araunah, “No, but I will certainly buy it from you for a price. I will not offer burnt offerings to the Lord my God which cost me nothing.” So David purchased the threshing floor and the oxen for fifty shekels of silver.