1 Samuel 1:2-7
And he had two wives; the name of the one was Hannah, and the name of the other Peninnah: and Peninnah had children…
Abraham's domestic peace was embittered, so that he was at length compelled to dismiss Hagar; and Jacob saw much strife arise amongst his household whose interest polygamy had divided. It is probable that the same feeling which operated with Abraham for taking Hagar influenced Elkanah in taking Peninneh, for Hannah seems to have been the first wife. There was doubtless an impatient desire of children; but in this case, as in those already alluded to, Elkanah's deviation from the original law of marriage, though in a manner then tolerated, conduced not at all to his domestic peace and comfort.
(T. E. Redwar, M. A.)
Parallel VersesKJV: And he had two wives; the name of the one was Hannah, and the name of the other Peninnah: and Peninnah had children, but Hannah had no children.