King James Version
He that justifieth the wicked, and he that condemneth the just, even they both are abomination to the LORD.(Proverbs 17:15)
Wherefore is there a price in the hand of a fool to get wisdom, seeing he hath no heart to it?(Proverbs 17:16)
A friend loveth at all times, and a brother is born for adversity.(Proverbs 17:17)
A man void of understanding striketh hands, and becometh surety in the presence of his friend.
He loveth transgression that loveth strife: and he that exalteth his gate seeketh destruction.(Proverbs 17:19)
He that hath a froward heart findeth no good: and he that hath a perverse tongue falleth into mischief.(Proverbs 17:20)
He that begetteth a fool doeth it to his sorrow: and the father of a fool hath no joy.(Proverbs 17:21)

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Proverbs 17:18 - Cross Reference

My son, if thou be surety for thy friend, if thou hast stricken thy hand with a stranger, (Proverbs 6:1)
Take his garment that is surety for a stranger: and take a pledge of him for a strange woman. (Proverbs 20:16)
Be not thou one of them that strike hands, or of them that are sureties for debts. (Proverbs 22:26)
He that is surety for a stranger shall smart for it: and he that hateth suretiship is sure. (Proverbs 11:15)
He that oppresseth the poor to increase his riches, and he that giveth to the rich, shall surely come to want. (Proverbs 22:16)