Psalm 77:18-20

Revised Standard Version Catholic Edition

¹⁸ The crash of thy thunder was in the whirlwind;
    thy lightnings lighted up the world;
    the earth trembled and shook.
¹⁹ Thy way was through the sea,
    thy path through the great waters;
    yet thy footprints were unseen.
²⁰ Thou didst lead thy people like a flock
    by the hand of Moses and Aaron.