Komentaryo sa 1 Samuel 1:12: Rashi, Metzudat David & Radak

Watched her mouth. He waited for her to stop, as Targum Yonoson renders, 'and Eili waited until she stopped.'

Watched her mouth: Meaning to say, he would watch what came out of her lips, to hear her words.

And as she kept on: In the homiletical teachings (Talmud Yerushalmi Berakhot 4:1): Rebbi Levi said [that] Rabbi Shimon [said] in the name of Rabbi Chalafta and in the name of Rabbi Meir, "From here, [we learn that] everyone who increases his prayers will be answered." The position of Rabbi Meir is inverted. There Rabbi Abbahu, the son of Rabbi Pappai and Rabbi Yehoshua of Sakhnin in the name of Rebbi Levi say, "'In all excitement there is something superfluous; and the word of the lips is but for deficit' (Proverbs 14:23) - Hannah, because she prayed too long, reduced the years of Samuel. As it is stated (I Samuel 1:22), 'He shall dwell there forever'; and 'forever,' for a Levite is only fifty years, as it is written (Numbers 8:25), 'And from age fifty, [he should return, etc.].'" Yet he was fifty-two! Rabbi Yose bar Bun said, "[That was because of the] two [years until] she weaned him."

Watched. An expression of waiting, as in, "[and his father] kept the matter in mind ]שָׁמַר["²⁴Bereishis 37:11. i.e., waited, [and similarly] "do not wait [תִשְׁמוֹר] for my sin."²⁵Iyov 14:16.