Matthew 5:37

But let your word be Yea, yea; Nay, nay; but what is more than these is from evil.

James 5:12

But before all things, my brethren, swear not, neither by heaven, nor by the earth, nor by any other oath; but let your yea be yea, and your nay, nay, that ye do not fall under judgment.

Matthew 13:19

From every one who hears the word of the kingdom and does not understand it, the wicked one comes and catches away what was sown in his heart: this is he that is sown by the wayside.

Matthew 13:38

and the field is the world; and the good seed, these are the sons of the kingdom, but the darnel are the sons of the evil one;

Matthew 15:19

For out of the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false witnessings, blasphemies;

John 8:44

Ye are of the devil, as your father, and ye desire to do the lusts of your father. He was a murderer from the beginning, and has not stood in the truth, because there is no truth in him. When he speaks falsehood, he speaks of what is his own; for he is a liar and its father:

John 17:15

I do not demand that thou shouldest take them out of the world, but that thou shouldest keep them out of evil.

2 Corinthians 1:17-20

Having therefore this purpose, did I then use lightness? Or what I purpose, do I purpose according to flesh, that there should be with me yea yea, and nay nay?

Ephesians 4:25

Wherefore, having put off falsehood, speak truth every one with his neighbour, because we are members one of another.

Colossians 3:9

Do not lie to one another, having put off the old man with his deeds,

Colossians 4:6

Let your word be always with grace, seasoned with salt, so as to know how ye ought to answer each one.

2 Thessalonians 3:3

But the Lord is faithful, who shall establish you and keep you from evil.

1 John 2:13

I write to you, fathers, because ye have known him that is from the beginning. I write to you, young men, because ye have overcome the wicked one. I write to you, little children, because ye have known the Father.

1 John 3:12

not as Cain was of the wicked one, and slew his brother; and on account of what slew he him? because his works were wicked, and those of his brother righteous.

1 John 5:18

We know that every one begotten of God does not sin, but he that has been begotten of God keeps himself, and the wicked one does not touch him.

Matthew 6:13

and lead us not into temptation, but save us from evil.

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
Having therefore this purpose, did I then use lightness? Or what I purpose, do I purpose according to flesh, that there should be with me yea yea, and nay nay?
Colossians 4:6
Let your word be always with grace, seasoned with salt, so as to know how ye ought to answer each one.
James 5:12
But before all things, my brethren, swear not, neither by heaven, nor by the earth, nor by any other oath; but let your yea be yea, and your nay, nay, that ye do not fall under judgment.

Cometh

Matthew 13:19
From every one who hears the word of the kingdom and does not understand it, the wicked one comes and catches away what was sown in his heart: this is he that is sown by the wayside.
Matthew 15:19
For out of the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false witnessings, blasphemies;
John 8:44
Ye are of the devil, as your father, and ye desire to do the lusts of your father. He was a murderer from the beginning, and has not stood in the truth, because there is no truth in him. When he speaks falsehood, he speaks of what is his own; for he is a liar and its father:
Ephesians 4:25
Wherefore, having put off falsehood, speak truth every one with his neighbour, because we are members one of another.
Colossians 3:9
Do not lie to one another, having put off the old man with his deeds,
James 5:12
But before all things, my brethren, swear not, neither by heaven, nor by the earth, nor by any other oath; but let your yea be yea, and your nay, nay, that ye do not fall under judgment.