Matthew 5:34, 37
"But I tell you, Do not swear at all...Simply let your 'Yes' be 'Yes' and your 'No' be 'No.'" NIV
"But I say unto you, Swear not at all.....But let your communication be, Yea, yea; Nay, nay." KJV
An oath is swearing that something is true. It is using God, His name, or things that belong to Him to back up what you are saying. "By God," "For heaven's sake," "On my mother's grave," "As God is my judge," are just a few examples. It is actually taking the Lord's name in vain because we are more concerned with being believed than we are with honoring God. Our lives should be lived with such integrity that we do not need to use anything else to back up what we say.
Heavenly Father, we don't even realize that words we say can be dishonoring to You. Forgive us for using oaths to make what we are saying more believable. Help us to live lives with such integrity that all we have to do is say what we need to say and stop there. Let the words of our mouths be pleasing to You, we pray in Jesus' name, Amen.