Whence do I derive (that the same applies) even if there is only one wife (who bears two sons) and she is loved or hated? From (the repetition) "loved" "loved," "hated" "hated."
Is there such a thing as "loved" or "hated" before the L-rd (i.e., as affecting marital status)? It must be (that "hated," then,) refers to ravished or seduced (i.e., "hated" by the L-rd), not in the manner of all the wives (as opposed to "loved," connoting halachically permitted union, [the halachah of non-favoritism obtaining also with sons of rape or seduction]). Whence do we derive (for inclusion in this halachah) (the sons of) a widow (wed) to a high-priest and (the sons of) a divorcée or a chalutzah (a levirate-refused woman, wed) to a regular Cohein (even though these unions are halachically interdicted)? From (the repetition of) "hated" "hated."