Matthew 5:37

but let your conversation be yea, yea; no, no; for whatever is more than these, cometh from the evil one.

James 5:12

But above all, my brethren, swear not; neither by heaven, nor by the earth, nor any other oath: but let your yea be yea, and your nay nay; that ye may not fall under condemnation.

Matthew 13:19

and regardeth it not, then cometh the wicked one, and snatcheth away that which was sown in his heart: this is he who received the seed as by the way-side.

Matthew 13:38

the field is the world; the good seed are the children of my kingdom; and the tares are the children of the wicked one.

Matthew 15:19

For out of the heart proceed wicked disputings, murders, adulteries, fornications, thefts, false-witnessings, slanders:

John 8:44

Ye are of your father the devil, and are bent upon doing the lusts of your father: he was a murderer from the beginning, and continued not in the truth: for there is no truth in him. When he speaketh a lie, he speaketh like himself, for he is a liar, and the father of such.

John 17:15

I do not pray that Thou wouldest take them out of the world, but that thou wouldest keep them from the evil.

2 Corinthians 1:17-20

Now when I intended this, was I chargeable with levity? or what I purpose, do I purpose from carnal motives, that with me there should be yea, yea, and then no, no?

Ephesians 4:25

Wherefore putting away lying, speak ye every one truth to his neighbor; for we are all members of one society.

Colossians 3:9

Lie not one to another, seeing ye have put off the old man with his evil practices;

Colossians 4:6

Let your speech be always with grace, seasoned with discretion to know how ye ought to answer every one.

2 Thessalonians 3:3

But the Lord is faithful, who will establish you, and preserve you from the evil one.

1 John 2:13

I write unto you, fathers, because ye have known Him that is from the beginning: and I write unto you, young men, because ye have overcome the wicked one. Yea I have written to you, little children, because ye have known the Father:

1 John 3:12

and why did he slay him? because his own works were evil, and his brother's righteous.

1 John 5:18

We know that whosoever is born of God, doth not practise sin: but keepeth himself from it, and the wicked one doth not touch him.

Matthew 6:13

and lead us not into temptation, but deliver us from the evil one: for thine is the kingdom, and the power, and the glory for ever. Amen."

Treasury of Scripture Knowledge

Summary

But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil.

Bible References

Let

2 Corinthians 1:17
Now when I intended this, was I chargeable with levity? or what I purpose, do I purpose from carnal motives, that with me there should be yea, yea, and then no, no?
Colossians 4:6
Let your speech be always with grace, seasoned with discretion to know how ye ought to answer every one.
James 5:12
But above all, my brethren, swear not; neither by heaven, nor by the earth, nor any other oath: but let your yea be yea, and your nay nay; that ye may not fall under condemnation.

Cometh

Matthew 13:19
and regardeth it not, then cometh the wicked one, and snatcheth away that which was sown in his heart: this is he who received the seed as by the way-side.
Matthew 15:19
For out of the heart proceed wicked disputings, murders, adulteries, fornications, thefts, false-witnessings, slanders:
John 8:44
Ye are of your father the devil, and are bent upon doing the lusts of your father: he was a murderer from the beginning, and continued not in the truth: for there is no truth in him. When he speaketh a lie, he speaketh like himself, for he is a liar, and the father of such.
Ephesians 4:25
Wherefore putting away lying, speak ye every one truth to his neighbor; for we are all members of one society.
Colossians 3:9
Lie not one to another, seeing ye have put off the old man with his evil practices;
James 5:12
But above all, my brethren, swear not; neither by heaven, nor by the earth, nor any other oath: but let your yea be yea, and your nay nay; that ye may not fall under condemnation.