What is the difference between waqf (endowment) and sabil (way/path), in meaning and ruling?

In language, waqf (endowment) means absolute detention. In Sharia, it is the detention of the principal of money given in charity for a designated purpose, and consecrating its usufruct for that purpose. As for sabil (path/way), linguistically it is a road, and in Sharia, it means making a gifted or charitable item available for the sake of Allah. If the intention of the one giving charity is to detain the principal of the charity and consecrate its usufruct, then it is an endowment (waqf) and an ongoing charity (sadaqa jariya). But if the intention is to transfer ownership of the charitable item itself, then it is merely charity (sadaqa) without being an ongoing one.

There is a general and specific relationship between them: every endowment is sabil, but not every sabil is an endowment. The proof is the Prophet's — peace and blessings be upon him — statement to Omar concerning his land: "detain the principal and consecrate the produce," and his — peace and blessings be upon him — saying: "If you wish, detain its principal and give it in charity." Omar then gave it in charity to the poor, to relatives, for freeing slaves, for the sake of Allah, to the traveler, and to the guest.