The Catechism in Questions & Answers

360. Why are the Ninth and Tenth Commandments often summarised into one?

The last two of the Ten Commandments are very closely linked in content. They are thus often counted as one commandment. There are various versions of these two commandments in the Bible. Exodus 20: 17 mentions the neighbour’s house first, while Deuteronomy 5: 21 mentions the neighbour’s wife first.