Is it obligatory to pay a monthly sum from a deceased husband's pension as a perpetual charity on his behalf, or is it preferable to pay a perpetual charity from the same pension for a sick son?

It is not obligatory for the wife to pay a monthly sum to her deceased husband, but doing so is a sign of faithfulness, recognition of his rights, and an indication that a good covenant is part of faith.

If the son is in need, it is more appropriate to give the money to him, especially if his expenses are obligatory upon the mother or if he has a share from his deceased father's pension. Giving charity to him would be both an act of charity and maintaining family ties, and it is best for a person to start with those they support. It is possible to combine both matters by giving charity to the son and dedicating the reward of it to the deceased.