Is it obligatory for the nuqūṭ (payment made to the family of the deceased as a form of condolence and support) to be distributed among all the children of the deceased, or only to the sole son?

A pension is either among the entitlements of the deceased, in which case it is considered part of his estate and is divided among his heirs, or it is a donation and is disbursed according to the condition of the donating entity. If custom dictates that a "nuqoot" (gift of money given at a celebration, expected to be reciprocated) must be compensated, then it is considered a debt upon the deceased, and the heirs must settle it from his estate. If the deceased did not leave behind what would settle his debt, then the heirs are not obligated to donate to settle it, except as a recommendation (i.e., it is praiseworthy). If the pension is a grant to the heirs and the deceased did not leave an inheritance, then the owner of the "nuqoot" does not need to be compensated. However, if the pension is from the entitlements of the deceased, then the owner of the "nuqoot" must be compensated from it if his claim is truthful; otherwise, not every claimant must be believed unless there is clear proof, or the heirs know of his truthfulness and trust him.