Ecclesiastes 5:6

Suffer not thy mouth to cause thy flesh for to sin, neither say thou before the angel that it is thy ignorance. For then God will be angry at thy voice, and destroy all the works of thine hands.

1 Corinthians 11:10

For this cause ought the woman to have power on her head, for the angels' sakes.

Genesis 48:16

And the angel which hath delivered me from all evil, bless these lads: that they may be called after my name, and after my father Abraham and Isaac, and that they may grow and multiply upon the earth."

Leviticus 5:4-6

Either when a soul sweareth: so that he pronounceth with his lips to do evil or to do good - whatsoever it be that a man pronounceth with an oath - and the thing be out of his mind and afterward cometh to the knowledge of it, then he hath offended in one of these.

Leviticus 27:9-10

"'If it be of the beasts of which men bring an offering unto the LORD: all that any man giveth of such unto the LORD, shall be holy.

Numbers 15:25

And the priest shall make an atonement for all the multitude of the children of Israel, and it shall be forgiven them, for it was ignorance. And they shall bring their gifts unto the offering of the LORD, and their sin offering before the LORD for their ignorance.

Ecclesiastes 5:1-2

Be not hasty with thy mouth,

Hosea 12:4-5

He strove with the angel, and gat the victory: so that he prayed and desired him. He found him at Bethel, and there he talked with us.

Haggai 1:9-11

Ye looked for much, and lo it is come to little: and though ye bring it home, yet do I blow it away. And why so, sayeth the LORD of Hosts? Even because that my house lieth so waste, and ye run every man unto his own house.

Haggai 2:14-17

The Priests gave answer and said, "Yea, it shall be unclean." Then Haggai answered, and said, "Even so is this people and this nation before me, sayeth the LORD: and so are all the works of their hands, yea and all that they offer, is unclean.

Malachi 2:7

For the priest's lips should be sure knowledge, that men may seek the law at his mouth, for he is a messenger of the LORD of Hosts.

Malachi 3:1

Behold, I send my messenger which shall prepare the way before me. And suddenly shall the Lord whom ye seek, come unto his temple, and the messenger of the covenant whom ye desire. Behold, he cometh saith the LORD Sabaoth.

Acts 7:30-35

"And when forty years were expired, there appeared to him in the wilderness of Mount Sinai, an angel of the Lord in a flame of fire in a bush.

1 Corinthians 3:13-15

every man's work shall appear. For the day shall declare it, and it shall be showed in fire, and the fire shall try every man's work what it is.

1 Timothy 5:21

I testify before God, and the Lord Jesus Christ, and the elect angels, that thou observe these things without hasty judgment, and do nothing partially.

Hebrews 1:14

Are they not all spirits to do service, sent for to minister for their sakes, which shall be heirs of salvation?

James 1:26

If any man among you seem devout, and refrain not his tongue: but deceive his own heart, this man's devotion is in vain.

James 3:2

For in many things we sin all. If a man sin not in word, the same is a perfect man and able to tame all the body.

2 John 1:8

Look on yourselves, that we lose not that we have wrought: but that we may have a full reward.

Treasury of Scripture Knowledge

Summary

Suffer not thy mouth to cause thy flesh to sin; neither say thou before the angel, that it was an error: wherefore should God be angry at thy voice, and destroy the work of thine hands?

Bible References

Thy mouth

Ecclesiastes 5:1
Be not hasty with thy mouth,
James 1:26
If any man among you seem devout, and refrain not his tongue: but deceive his own heart, this man's devotion is in vain.
James 3:2
For in many things we sin all. If a man sin not in word, the same is a perfect man and able to tame all the body.

Before

Leviticus 5:4
Either when a soul sweareth: so that he pronounceth with his lips to do evil or to do good - whatsoever it be that a man pronounceth with an oath - and the thing be out of his mind and afterward cometh to the knowledge of it, then he hath offended in one of these.
Genesis 48:16
And the angel which hath delivered me from all evil, bless these lads: that they may be called after my name, and after my father Abraham and Isaac, and that they may grow and multiply upon the earth."
Hosea 12:4
He strove with the angel, and gat the victory: so that he prayed and desired him. He found him at Bethel, and there he talked with us.
Malachi 2:7
For the priest's lips should be sure knowledge, that men may seek the law at his mouth, for he is a messenger of the LORD of Hosts.
Malachi 3:1
Behold, I send my messenger which shall prepare the way before me. And suddenly shall the Lord whom ye seek, come unto his temple, and the messenger of the covenant whom ye desire. Behold, he cometh saith the LORD Sabaoth.
Acts 7:30
"And when forty years were expired, there appeared to him in the wilderness of Mount Sinai, an angel of the Lord in a flame of fire in a bush.
1 Corinthians 11:10
For this cause ought the woman to have power on her head, for the angels' sakes.
1 Timothy 5:21
I testify before God, and the Lord Jesus Christ, and the elect angels, that thou observe these things without hasty judgment, and do nothing partially.
Hebrews 1:14
Are they not all spirits to do service, sent for to minister for their sakes, which shall be heirs of salvation?

It was

Leviticus 5:4
Either when a soul sweareth: so that he pronounceth with his lips to do evil or to do good - whatsoever it be that a man pronounceth with an oath - and the thing be out of his mind and afterward cometh to the knowledge of it, then he hath offended in one of these.
Leviticus 27:9
"'If it be of the beasts of which men bring an offering unto the LORD: all that any man giveth of such unto the LORD, shall be holy.

Destroy

Haggai 1:9
Ye looked for much, and lo it is come to little: and though ye bring it home, yet do I blow it away. And why so, sayeth the LORD of Hosts? Even because that my house lieth so waste, and ye run every man unto his own house.
Haggai 2:14
The Priests gave answer and said, "Yea, it shall be unclean." Then Haggai answered, and said, "Even so is this people and this nation before me, sayeth the LORD: and so are all the works of their hands, yea and all that they offer, is unclean.
1 Corinthians 3:13
every man's work shall appear. For the day shall declare it, and it shall be showed in fire, and the fire shall try every man's work what it is.
2 John 1:8
Look on yourselves, that we lose not that we have wrought: but that we may have a full reward.