2 Samuel 24:18-25 - David's Altar
18 Then Gad came to David on that same day and said to him, "Go up and erect an altar to Yahweh at the threshing floor of Araunah the Jebusite." 19 So David went up according to the word of Gad, as Yahweh had commanded. 20 Araunah looked down and saw the king and his servants coming over to him, so Araunah went out and bowed down before the king with his face to the ground.
21 Then Araunah said, "Why has my lord the king come to his servant?" David said, "To buy from you the threshing floor, to build an altar to Yahweh who brought a halt to the plague on the people."
22 Araunah said to David, "Let my lord the king take and offer what [is] good in his eyes. Look, here [are] the cattle for the burnt offering and the threshing sledge and the yokes of the oxen for the firewood. 23 All of this Araunah hereby gives to the king." Then Araunah said to the king, "May Yahweh your God respond favorably for you."
24 Then the king said to Araunah, "No, but {I will certainly buy} it from you for a price; I don't want to offer to Yahweh my God burnt offerings that cost me nothing." So David bought the threshing floor and the cattle for fifty shekels of silver. 25 David built an altar to Yahweh there, and he offered burnt offerings and fellowship offerings. Then Yahweh responded to [his] prayer for the land and brought the plague to a halt from upon Israel.