Waqf is a centuries-old Islamic tradition established by the Prophet Muhammad (peace be upon him). It is a form of sustainable giving that has provided support throughout the Muslim world.
To illustrate, Waqf is a donation of money, property or other assets. The profit from which is are given away as charity. Furthermore, donating a Waqf means never-ending blessings for the donor. Therefore, making Waqf a donation that keeps on giving year after year (sadaqa jariyah).