Proverbs 27:16-18

New International Version

¹⁶ restraining her is like restraining the wind
    or grasping oil with the hand.

¹⁷ As iron sharpens iron,
    so one person sharpens another.

¹⁸ The one who guards a fig tree will eat its fruit,^(A)
    and whoever protects their master will be honored.^(B)