Albert Barnes Commentary 1 Samuel 1:7

"And [as] he did so year by year, when she went up to the house of Jehovah, so she provoked her; therefore she wept, and did not eat." — 1 Samuel 1:7 (ASV)

And as he did so ... - It should rather be, “And so she did year by year, as often as she went up to the House of the Lord, so she provoked her.” Though the verb is masculine, Peninnah must be the subject, because the phrase “as often as she went up” follows. The Vulgate has “they went up.”