This Bible contradiction is from the EvilBible.com.

Verses

David sinned in numbering the people

2 Samuel 24:10 View context

And David's heart smote him after that he had numbered the people. And David said unto the LORD, I have sinned greatly in that I have done: and now, I beseech thee, O LORD, take away the iniquity of thy servant; for I have done very foolishly.

David never sinned, except in the matter of Uriah

1 Kings 15:5 View context

Because David did [that which was] right in the eyes of the LORD, and turned not aside from any [thing] that he commanded him all the days of his life, save only in the matter of Uriah the Hittite.