2 Samuel 24:4-9

But the king insisted that they take the census, so Joab and the commanders of the army went out to count the people of Israel. First they crossed the Jordan and camped at Aroer, south of the town in the valley, in the direction of Gad. Then they went on to Jazer, then to Gilead in the land of Tahtim-hodshi and to Dan-jaan and around to Sidon. Then they came to the fortress of Tyre, and all the towns of the Hivites and Canaanites. Finally, they went south to Judah as far as Beersheba. Having gone through the entire land for nine months and twenty days, they returned to Jerusalem. Joab reported the number of people to the king. There were 800,000 capable warriors in Israel who could handle a sword, and 500,000 in Judah.