High Quality Content by WIKIPEDIA articles! Thou shalt not take the name of the Lord thy God in vain (KJV, also "You shall not make wrongful use of the name of the Lord your God" (NRSV) and variants) is one of the Ten Commandments. It is a prohibition of blasphemy, specifically, the misuse or "taking in vain" of the name of the God of Israel. Exodus 20:7 reads: