1 Samuel 1:10-12 New Revised Standard Version, Anglicised Catholic Edition (NRSVACE)
10 She was deeply distressed and prayed to the Lord, and wept bitterly. 11 She made this vow: ‘O Lord of hosts, if only you will look on the misery of your servant, and remember me, and not forget your servant, but will give to your servant a male child, then I will set him before you as a nazirite[a] until the day of his death. He shall drink neither wine nor intoxicants,[b] and no razor shall touch his head.’
12 As she continued praying before the Lord, Eli observed her mouth.