Cross reference
Leviticus 20:21
21 And if a man shall take his brother's wife, it is impurity: he hath uncovered his brother's nakedness; they shall be childless.
Leviticus 18:16
16 Thou shalt not uncover the nakedness of thy brother's wife: it is thy brother's nakedness.
Matthew 14:3-4
3 For Herod had laid hold on John, and bound him, and put him in prison for the sake of Herodias, his brother Philip's wife.
4 For John said unto him, It is not lawful for thee to have her.