Isaiah 26:3-5

Revised Standard Version Catholic Edition

³ Thou dost keep him in perfect peace,
    whose mind is stayed on thee,
    because he trusts in thee.
⁴ Trust in the Lord for ever,
    for the Lord God
    is an everlasting rock.
⁵ For he has brought low
    the inhabitants of the height,
    the lofty city.
He lays it low, lays it low to the ground,
    casts it to the dust.