2 Samuel 24:18

Overview - 2 Samuel 24
David, tempted by Satan, forces Joab to number the people.
The captains, in nine months and twenty days, bring the muster of thirteen hundred thousand fighting men.
10 David repents, and having three plagues propounded by God, chooses the three days' pestilence.
15 After the death of three score and ten thousand, David by prayer prevents the destruction of Jerusalem.
18 David, by God's direction, purchases Araunah's threshing floor; where having sacrificed, the plague stays.
Treasury of Scripture Knowledge

2 Samuel 24:18  (King James Version)
And Gad came that day to David, and said unto him, Go up, rear an altar unto the LORD in the threshingfloor of Araunah the Jebusite.

11 ; 1 Chronicles 21:18-30

threshing floor
These, among the ancient Jews, were only round, level plats of ground in the open air, as they are to this day in the East, where the corn was trodden out by oxen.

Hebrew Araniah.