7 You shall not use or repeat the name of the Lord your God in vain [that is, lightly or frivolously, in false affirmations or profanely]; for the Lord will not hold him guiltless who takes His name in vain.
Exodus 20:7 AMPC
Do not Use the Lord's Name in Vain
The name of God is Yahweh in Hebrew. The Jews would not even say the name of God so they would not use the Lord's name in vain. They walked in the fear of the Lord and had the utmost respect for God. Today, many people will use the Lord's name in vain. It started to become a trend when movies and T.V shows say it commonly. People will say OMG frivolously, or say Jesus Christ in anger as a curse word. When I hear it, it grieves my spirit because I know that it grieves the Holy Spirit.
This command also lines up with what Jesus says in Mathew 12:36-37 about how our words will either justify us or condemn us. We must stand up for the commands of Jesus and remind people to not use the Lord's name in vain.
36 But I tell you, on the day of judgment men will have to give account for every idle (inoperative, nonworking) word they speak.
37 For by your words you will be justified and acquitted, and by your words you will be condemned and sentenced.
Matthew 12:36-37 AMPC