He will keep the feet of his saints, and the wicked shall be silent in darkness; for by strength shall no man prevail.

Wesley's Notes

2:9 Feet - That is, the steps or paths, their counsels and actions; he will keep; that is, both uphold, that they may not fall into ruin; and direct and preserve from wandering, and from those fatal errors that wicked men daily run into. Silent - Shall be put to silence: they who used to open their mouths wide against heaven, and against the saints, shall be so confounded with the unexpected disappointment of all their hopes, and with God's glorious appearance and operations for his people, that they shall have their mouths quite stopped. Darkness - Both inward, in their own minds, not knowing what to say or do; and outward, in a stat e of deep distress. Prevail - Namely, against God, or against his saints, as the wicked were confident they should do, because of their great power, and wealth, and numbers.

Matthew Henry's Concise Commentary

2:1-10 Hannah's heart rejoiced, not in Samuel, but in the Lord. She looks beyond the gift, and praises the Giver. She rejoiced in the salvation of the Lord, and in expectation of His coming, who is the whole salvation of his people. The strong are soon weakened, and the weak are soon strengthened, when God pleases. Are we poor? God made us poor, which is a good reason why we should be content, and make up our minds to our condition. Are we rich? God made us rich, which is a good reason why we should be thankful, and serve him cheerfully, and do good with the abundance he gives us. He respects not man's wisdom or fancied excellences, but chooses those whom the world accounts foolish, teaching them to feel their guilt, and to value his free and precious salvation. This prophecy looks to the kingdom of Christ, that kingdom of grace, of which Hannah speaks, after having spoken largely of the kingdom of providence. And here is the first time that we meet with the name MESSIAH, or his Anointed. The subjects of Christ's kingdom will be safe, and the enemies of it will be ruined; for the Anointed, the Lord Christ, is able to save, and to destroy.