Is it permissible for the poor, widowed daughter-in-law to take from the will of her deceased mother-in-law, designated for the poor and needy, given that she is in dire straits and cannot adequately provide for her infant?

It is permissible for the son's wife to take from the will if she is poor, because she is not among the heirs. As for the poor son, it is permissible for him to take from the general will designated for the poor, the needy, and the like, as an heir enters into a general will by description, not by specific designation, provided that it is not a special will for an heir without the consent of the rest of the heirs.