2 Samuel 24:8-10

New International Version - UK

⁸ After they had gone through the entire land, they came back to Jerusalem at the end of nine months and twenty days.

⁹ Joab reported the number of the fighting men to the king: in Israel there were eight hundred thousand able-bodied men who could handle a sword, and in Judah five hundred thousand.

¹⁰ David was conscience-stricken after he had counted the fighting men, and he said to the Lord, ‘I have sinned greatly in what I have done. Now, Lord, I beg you, take away the guilt of your servant. I have done a very foolish thing.’