2 Samuel 24:9-11

Young's Literal Translation

⁹ and Joab giveth the account of the inspection of the people unto the king, and Israel is eight hundred thousand men of valour, drawing sword, and the men of Judah five hundred thousand men.

¹⁰ And the heart of David smiteth him, after that he hath numbered the people, and David saith unto Jehovah, `I have sinned greatly in that which I have done, and now, O Jehovah, cause to pass away, I pray Thee, the iniquity of Thy servant, for I have acted very foolishly.'

¹¹ And David riseth in the morning, and the word of Jehovah hath been unto Gad the prophet, seer of David, saying,