"Thus one may deduce two laws from But the Gemara objected further that still that the words of "the first-fruits of "his" [the father’s] strength," not "her" strength, might apply only to the case of a widower (who had children from his first wife) who married a virgin (since the first son from the second marriage would be only the wife's firstborn, not the husband's).But where a bachelor married a virgin (and thus the son would be the firstborn of both the father and the mother), the firstborn son might take a double portion also in his mother's estate.