I discovered this verse shortly after Christmas. It's now one of my favorites:

My son, sow not upon the furrows of unrighteousness, and thou shalt not reap them sevenfold.
—Ecclesiasticus 7:3

Ecclesiasticus, an Apocryphal example of Hebrew wisdom literature, is one of my favorite Biblical books, probably because the Jesus ben Sirach's cynicism meshes so well with my own.

I can think of nine whom I would call blessed,
and a tenth my tongue proclaims:
a man who can rejoice in his children;
a man who lives to see the downfall of his foes.
Happy the man who lives with a sensible wife,
and one who does not plough with ox and ass together.
Happy is one who does not sin with the tongue,
and one who has not served an inferior.
Happy is one who finds a friend,
and one who speaks to attentive listeners.
How great is one who finds wisdom!
But none is superior to one who fears the Lord.
Fear of the Lord surpasses everything;
to whom can we compare one who has it?(25:7-11)

The New Oxford Annotated Bible complains about Sirach's attitude towards women: "androcentric at best…at times he expresses an untempered misogyny"$mdash;parts of Ecclesiasticus leave one wondering if he had someone specific in mind; take for example 25:13-26:

Any wound, but not a wound of the heart!
Any wickedness, but not the wickedness of a woman!
Any suffering, but not suffering from those who hate!
And any vengeance, but not the vengeance of enemies!
There is no venom worse than a snake’s venom,
and no anger worse than a woman’s wrath.
I would rather live with a lion and a dragon
than live with an evil woman.
A woman’s wickedness changes her appearance,
and darkens her face like that of a bear.
Her husband sits among the neighbours,
and he cannot help sighing bitterly.
Any iniquity is small compared to a woman’s iniquity;
may a sinner’s lot befall her!
A sandy ascent for the feet of the aged—
such is a garrulous wife to a quiet husband.
Do not be ensnared by a woman’s beauty,
and do not desire a woman for her possessions.
There is wrath and impudence and great disgrace
when a wife supports her husband.
Dejected mind, gloomy face,
and wounded heart come from an evil wife.
Drooping hands and weak knees
come from the wife who does not make her husband happy.
From a woman sin had its beginning,
and because of her we all die…