Then she made a vow and said, “O Lord of hosts, if You will indeed look on the affliction of Your maidservant and remember me, and not forget Your maidservant, but will give Your maidservant a male child, then I will give him to the Lord all the days of his life, and no razor shall come upon his head.”
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Vows are characteristic of this particular age of the Judges (Judges 21:5; 1 Samuel 14:24). For the law of vows in the case…

And she vowed a vow. — Hannah's vow contained two solemn promises. The first pledged the son she prayed for to the service of the …

And she vowed a vow
Which might be confirmed by her husband; otherwise the vow of a woman, if disapproved of by her …

Hannah mingled tears with her prayers; she considered the mercy of our God, who knows the troubled soul. God allows us, in prayer, not only to ask …
Albert Barnes
AlbertBarnes