Deuteronomy 5:11
Thou shalt not take the name of the Lord thy God in vain: for the Lord will not hold him guiltless that taketh his name in vain.
Cross-reference
In Deuteronomy 6:13, swearing by God's name is commanded as an act of fear and service, complementing the prohibition against taking it in vain.
In Exodus 20:7, the same commandment appears in identical wording, showing this is a direct repetition of the Decalogue.
In Leviticus 19:12, swearing falsely by God's name is prohibited as a specific way of profaning His name, expanding on 'taking in vain'.
Matthew 5:34 intensifies the command by prohibiting all oaths, contrasting with the OT 'not in vain'.
James 5:12 reinforces Jesus' teaching against oaths, showing the NT goes beyond the OT prohibition.
Malachi 3:5 lists false swearers among the judged, directly echoing the third commandment's prohibition.
Jeremiah 4:2 shows the positive counterpart: swearing by God's name in truth and righteousness, contrasting with vain use.
Matthew 5:33 applies the principle to false swearing, a specific violation of taking God's name in vain.
In Psalm 139:20, the psalmist describes enemies who 'take your name in vain', providing an example of the sin forbidden in Deut 5:11.