Matthew 5:37

“But let your communication be yea, yea, etc.] That is, let your speech, in your common conversation, and daily business of life, when ye answer to anything in the affirmative, be “yea”; and when ye answer to anything in the negative, “nay”: and for the stronger asseveration of the matter, when it is necessary, double these words; but let no oaths be joined unto them: this is enough; a righteous man’s yea, is yea, and his no, is no; his word is sufficient. Hence it appears, that our Lord is here speaking of rash swearing, and such as was used in common conversation, and is justly condemned by him. The Jews have no reason to reject this advice of Christ, who often use and recommend the same…”

“But let your communication--"your word," in ordinary intercourse, be, Yea, yea; Nay, nay--Let a simple Yes and No suffice in affirming the truth or the untruth of anything. (See Jam 5:12; Co2 1:17-18). for whatsoever is more than these cometh of evil--not "of the evil one"; though an equally correct rendering of the words, and one which some expositors prefer. It is true that all evil in our world is originally of the devil, that it forms a kingdom at the head of which he sits, and that, in every manifestation of it he has an active part. But any reference to this here seems unnatural, and the allusion to this passage in the Epistle of James (Jam 5:12) seems to show that this is not the…”

“But let your communication - Your word; what you say. Be, Yea - Yes. This does not mean that we should always use the word “yea,” for it might as well have been translated “yes”; but it means that we should simply affirm or declare that a thing is so. More than these - More than these affirmations. Cometh of evil - Is evil. Proceeds from some evil disposition or purpose. And from this we may learn: 1. That profane swearing is always the evidence of a depraved heart. To trifle with the name of God, or with any of his works, is itself most decided proof of depravity. 2. That no man is believed any sooner in common conversation because he swears to a thing. When we hear a man swear to a thing,…”

“Let your conversation be yea, yea; nay, nay - That is, in your common discourse, barely affirm or deny. Matthew 5:38”

“let: Co2 1:17-20; Col 4:6; Jam 5:12 cometh: Mat 13:19, Mat 15:19; Joh 8:44; Eph 4:25; Col 3:9; Jam 5:12 Matthew 5:38”