§ 02 · King James Bible
Leviticus 20:21
And if a man shall take his brother’s wife, it is an unclean thing: he hath uncovered his brother’s nakedness; they shall be childless.
Simple English
If a man marries his brother's wife, it is wrong. He has seen his brother's private parts. They won't have children.
* Work in progress - there may be occasional inaccuracies