Is it permissible to pay the deferred dower (sadaq) -which was agreed upon as an amount for Hajj to the Sacred House- in installments, and is it permissible for the wife to receive the money and spend it on matters other than Hajj, and is the value of Hajj estimated at its current price or at its price ten years ago?

Scholars have differed regarding making the dower (mahr) a usufruct (manfa'ah), and the preponderant opinion is its permissibility and the validity of the marriage with it. Thus, there is no objection to the spouses agreeing to make the deferred dower the performance of Hajj for the wife, and this is binding upon him. She may waive it to cover the expenses of Hajj or absolve the husband from it. The estimation of the Hajj expenses is determined by mutual agreement between the spouses. The deferred dower is a fixed right for the wife, incumbent upon the husband, and becomes due upon divorce. The husband must fulfill it, and she may allow him to pay it in installments or waive all or part of it.