7 The legs of the lame are not equal: so is a parable in the mouth of fools.
It is remarkably characteristic of Proverbs that there is no reference to the many specific aspects of life under the Law of Moses, as the Sabbath, Tithing, Feasts, Sacrifices, etc.
This is clearly a divine book of instruction for all times, and for all circumstances. Those who do not accept the divine origin of the book cannot see how Israel -- so bound by the limited horizons of the Mosaic Law -- could produce such a book of instruction in daily walk that takes no special recognition of that Law.
The Proverbs are "dark sayings." They require study -- searching out -- prayerful meditation, for their understanding; and wisdom and discernment in their application.
Bro Growcott - She openeth her mouth with wisdom.
True, however moral precepts established in the Law abound in the proverbs (note to admin - show examples to illustrate this)