Bible Verses About keeping promises

“If a man vow a vow unto the LORD, or swear an oath to bind his soul with a bond; he shall not break his word, he shall do according to all that proceedeth out of his mouth. break: Heb. profane”

“My covenant will I not break, nor alter the thing that is gone out of my lips.”

“When thou vowest a vow unto God, defer not to pay it; for he hath no pleasure in fools: pay that which thou hast vowed.”

“The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance.”

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

“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.”

“God is not a man, that he should lie; neither the son of man, that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good?”

“There failed not ought of any good thing which the LORD had spoken unto the house of Israel; all came to pass.”

“Again, ye have heard that it hath been said by them of old time, Thou shalt not forswear thyself, but shalt perform unto the Lord thine oaths:”

“And, behold, this day I am going the way of all the earth: and ye know in all your hearts and in all your souls, that not one thing hath failed of all the good things which the LORD your God spake concerning you; all are come to pass unto you, and not one thing hath failed thereof.”

“Let us hold fast the profession of our faith without wavering; (for he is faithful that promised;)”

“For all the promises of God in him are yea, and in him Amen, unto the glory of God by us.”

“When thou shalt vow a vow unto the LORD thy God, thou shalt not slack to pay it: for the LORD thy God will surely require it of thee; and it would be sin in thee.”