Is it permissible for the waqf beneficiary to sell the endowed livestock after the death of the endower if he no longer needs it?

It is permissible to وقف (dedicate as an endowment) livestock. If a man dedicates livestock to a specific person for their benefit, the beneficiary is not permitted to sell it as long as it is possible to benefit from it, even if they do not need it and even if the waqif (endower) did not stipulate the condition of need; because the condition of the waqif must be acted upon. If they sell it, the sale is invalid, and they are obligated to return the livestock. If it is impossible to return it, its price should be used to purchase other livestock to be a waqf, just as when the benefits of the endowed livestock become defunct, it is permissible to sell them and use their price to purchase other livestock to be a waqf. Al-Mardawi said in Al-Insaf: "If it is ruined or was a horse and became disabled, it is permissible to sell it and use its price for its like."