«اِلزِّيَادَهْ فِي الْوَقْفْ حَلَالْ»

The saying holds that anyone who has already set up a charitable endowment and later enlarges it is performing a further righteous act. The word usually meaning 'permitted' here signals a meritorious deed earning divine reward, so reading it as merely 'lawful' understates the point.

The reasoning rests on the purpose of a waqf, property set aside for charitable and religious ends: since what it yields is devoted to good causes, enlarging it extends that good, so the addition itself counts as another meritorious act.

Suited to praising or encouraging someone who adds to a charitable endowment they have already established, presenting the additional contribution as a further deed that earns reward.