וַיְהִ֣י הַיּ֔וֹם וַיִּזְבַּ֖ח אֶלְקָנָ֑ה וְנָתַ֞ן לִפְנִנָּ֣ה אִשְׁתּ֗וֹ וּֽלְכָל־בָּנֶ֛יהָ וּבְנוֹתֶ֖יהָ מָנֽוֹת׃
到了節期那天，以利加拿獻祭，他把祭肉分給妻子毗尼拿和她所有的兒女，每人各得一份。
Radak
And it was on that day: The day of the set time; and likewise did Yonatan translate it [in the Targum] as, "the day of the set time." And in the homiletical teachings: Rabbi Yehoshua be Levi said, "This was the day of Shavuot."
Metzudat David
And it was on that day: Meaning to say, when the day came that he would bring his sacrifices, Elkanah would sacrifice peace-offerings and he would give portions to Peninah, etc. from the sacrifice of the peace-offerings.