«مِنْ لَقَى بَنَّا مِنْ غِيرْ كُلْفَهْ يِبْنِي لُهْ مِيةْ غُرْفَهْ»

When a mason will work without wages and the building materials cost nothing, a person who might have settled for a single room ends up ordering a hundred. The image shows how demand swells once every expense disappears.

More broadly, the proverb comments on how anything obtained free of charge tends to be used in excess. Without a price to set a natural limit, the quantity taken multiplies well beyond what one would otherwise want.

Apply it when someone takes, orders, or commissions far more of something than they ordinarily would because it costs them nothing, such as free services, supplies, or work done without payment.