Thou shalt not bear false witness against thy neighbour.
A commandment given to the Israelites on Mount Sinai.
Exodus 20:16
King James Version (public domain)
Traditionally attributed to Moses · c. 13th century BC · The Pentateuch — Genesis, Exodus, Leviticus, Numbers, and Deuteronomy — is traditionally attributed to him
Context
14Thou shalt not commit adultery.
15Thou shalt not steal.
16Thou shalt not bear false witness against thy neighbour.
17Thou shalt not covet thy neighbour’s house, thou shalt not covet thy neighbour’s wife, nor his manservant, nor his maidservant, nor his ox, nor his ass, nor any thing that is thy neighbour’s.
18And all the people saw the thunderings, and the lightnings, and the noise of the trumpet, and the mountain smoking: and when the people saw it, they removed, and stood afar off.