On the day when Elkanah sacrificed, he would give portions to Peninnah his wife and to all her sons and daughters.
We have here an account of the state of the family into which Samuel the prophet was born. His father's name was Elkanah, a Levite, and of the family of the Kohathites (the most honourable house of that tribe) as appears, Ch1 6:33, Ch1 6:34. His ancestor Zuph was an Ephrathite, that is, of Bethlehem-Judah, which was called Ephrathah, Ruth, Rut 1:2.
Commenting on 1 Samuel 1:1-8
And when the time was that Elkanah offered,.... That is, brought his offering to the priest, to offer it for him, which was at one of the three festivals. According to R. Joshua Ben Levi (f), this was at the time of Pentecost; but Abarbinel thinks it was at the time of the ingathering of the fruits of the earth, which was a time of...
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 Lev 3:3; Deu 12:12).