What is the ruling on a man dedicating his land as an endowment (waqf) in perpetuity, specifically for the Eid prayers on these two days only?

Detaining land for the Eid prayers is considered a recommended and enforceable endowment (waqf) when the conditions for endowment are met, whereby the principal is detained and the usufruct is given in charity. The proof for this is the action of Umar ibn al-Khattab, may Allah be pleased with him, when he detained his land in Khaybar and gave its produce in charity. If the owner endows his land for the Eid prayers, it is not permissible to use it for anything else, because its ownership transfers to Allah Almighty upon endowment.