And it came to pass, as she continued praying before the LORD, that Eli observed her mouth.
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George Leo Haydock
Prayers, out of fervour; not through vain superstition and ostentation, as the Pharisees and pagans did, Matthew xxiii. 14. Christ does not condemn many, or long prayers, since he prayed whole nights for our instruction, Luke xxi. 43., and vi. 12., and 1 Thessalonians v. 17.
Mouth. He tried, but could not hear what she said. (Calmet)