Proverbs 20:25
"It is a snare to the man who devoureth that which is holy, and after vows to make enquiry."
Cross References (ranked by relevance)
Matthew 5:33
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:
Leviticus 5:15
If a soul commit a trespass, and sin through ignorance, in the holy things of the LORD; then he shall bring for his trespass unto the LORD a ram without blemish out of the flocks, with thy estimation by shekels of silver, after the shekel of the sanctuary, for a trespass offering:
Proverbs 18:7
A fool’s mouth is his destruction, and his lips are the snare of his soul.