2 Samuel 24:8

Overview - 2 Samuel 24
1	David, tempted by Satan, forces Joab to number the people.
5	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.

2 Samuel 24:8  (King James Version)
So when they had gone through all the land, they came to Jerusalem at the end of nine months and twenty days.