But above all things, my brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and your nay, nay; lest ye fall into condemnation. James, Chapter 5, verse 12.
This passage lets me know that I can tell the truth when I’m talking to people without saying, “It’s the truth, too-Swear to God,” or, “It’s the truth, too-I Swear it on the Bible.” These extra sayings for emphasis aren’t necessary and aren’t what God wants.
Here is a related passage:*But I say unto you, Swear not at all; neither by heaven; for it is God’s throne: Nor by the earth: for it is His footstool: neither by Jerusalem: for it is the city of the great King, Neither shalt thou swear by thy head, because thou canst not make one hair white or black, But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil. Matthew, Chapter 5, verses 34-37.
Because this is an example of how I’ve applied this Bible passage to my life, it doesn't necessarily reflect the whole meaning of the passage.