Deuteronomy 5:18 KJV
Neither shalt thou commit adultery.
Deuteronomy 5:16–20 KJV Chapter Context
16
Honour thy father and thy mother, as the LORD thy God hath commanded thee; that thy days may be prolonged, and that it may go well with thee, in the land which the LORD thy God giveth thee.
17
Thou shalt not kill.
18
Neither shalt thou commit adultery.
19
Neither shalt thou steal.
20
Neither shalt thou bear false witness against thy neighbour.