James Chapter 5, Verse 12
From BibleWiki
12: προ παντων δε αδελφοι μου μη ομνυετε μητε τον ουρανον μητε την γην μητε αλλον τινα ορκον ητω δε υμων το ναι ναι και το ου ου ινα μη εις υποκρισιν υπο κρισιν πεσητε
12: 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.
12: But above all things, my brethren, swear not, neither by heaven,
nor by the earth, nor by any other oath. But let your speech be: Yea,
Yea: No, No: that you fall not under judgment.
But above all things. That is, be especially careful on this point; whatever else is done, let not this be. The manner in which James speaks of the practice referred to here, shows that he regarded it as a sin of a very heinous nature; one that was by all means to be avoided by those whom he addressed. The habit of swearing by various things was a very common one among the Jews, and it was important to guard those who from among them had been converted to Christianity on that subject.
Swear not. see "Mt 5:33f" for this command illustrated. Nearly the same things are mentioned here as objects by which they were accustomed to swear which are referred to by Jesus.
But let your yea be yea. Let there be a simple affirmation, unaccompanied by any oath or appeal to God or to any of his works. A man who makes that his common method of speech is the man who will be believed. see "Mt 5:37".
Lest ye fall into condemnation. That is, for profaning the name of God. "The Lord will not hold him guiltless that taketh his name in vain," Ex 20:7.

