Matthew 5:37 (NKJV)
"But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil."
Jeremiah 23:23-24 (NKJV)
"Am I a God at hand, saith the Lord, and not a God afar off? Can any hide himself in secret places that I shall not see him? saith the Lord. Do not I fill heaven and earth? saith the Lord."
James 5:12 (AMP)
"But above all, my fellow believers, do not swear, either by heaven or by earth or with any other oath; but let your yes be [a truthful] yes, and your no be [a truthful] no, so that you may not fall under judgment."
Romans 7:15-18 (AMP)
"For I do not understand my own actions [I am baffled and bewildered by them]. I do not practice what I want to do, but I am doing the very thing I hate [and yielding to my human nature, my worldliness—my sinful capacity]. Now if I habitually do what I do not want to do, [that means] I agree with the Law, confessing that it is good (morally excellent). So now [if that is the case, then] it is no longer I who do it [the disobedient thing which I despise], but the sin [nature] which lives in me. For I know that nothing good lives in me, that is, in my flesh [my human nature, my worldliness—my sinful capacity]. For the willingness [to do good] is present in me, but the doing of good is not."
Hebrews 13:7-8 (NIV)
"Remember your leaders, who spoke the word of God to you. Consider the outcome of their way of life and imitate their faith. Jesus Christ is the same yesterday and today and forever."