וַיַּ֧עַן עֵלִ֛י וַיֹּ֖אמֶר לְכִ֣י לְשָׁל֑וֹם וֵאלֹהֵ֣י יִשְׂרָאֵ֗ל יִתֵּן֙ אֶת־שֵׁ֣לָתֵ֔ךְ אֲשֶׁ֥ר שָׁאַ֖לְתְּ מֵעִמּֽוֹ׃
Eli antwortete darauf und sprach: Gehe in Frieden, der Gott Israels gewähre dein Begehr, was du von ihm begehrt hast.
Radak
May the Lord fulfill His word: The verses show that what Eli said (I Samuel 1:17), "May (the Lord) grant what you have asked," was by way of prophecy - that the Lord would grant her what she asked. And behold what she asked was that she should have offspring of men and that he should be for the Lord. Hence [Elkanah] said, "May the Lord fulfill His word" - the explanation of which is, that which he spoke through the prophet, that He will grant you what you asked. And that is a son that will live and who will be for the Lord. And in the homiletical teachings: "But may the Lord fulfill His word" - every day, a heavenly voice would come out and clamor in the world and say, "In the future, a righteous one will arise, and his name is Shmuel." So every woman who would give birth to a son, would bring out his name as Shmuel. Once they saw his deeds, they would say, "This is not Shmuel." When this one was born and they saw his deeds, they said, "It appears that this is he." And that is what is written, "May the Lord fulfill His word"