Jamieson, Fausset and Brown on 1 Samuel 1:4

4. when ... Elkanah offered, he gave to Peninnah ... portions--The offerer received back the greater part of the peace offerings, which he and his family or friends were accustomed to eat at a social feast before the Lord. (See on Le 3:3; De 12:12). It was out of these consecrated viands Elkanah gave portions to all the members of his family; but "unto Hannah he gave a worthy portion"; that is, a larger choice, according to the Eastern fashion of showing regard to beloved or distinguished guests. (See on 1Sa 9:24; also see on Ge 43:34).