Psalms 136King James Version

The Great Hallel: every verse ends with 'for his mercy endureth for ever.' Twenty-six verses moving from creation through the Exodus to the settlement of Canaan to God feeding all flesh, each verse punctuated by the congregation's antiphon. He made the great lights: his mercy endures. He smote Egypt: his mercy endures. He overthrew Pharaoh: his mercy endures. He led through the wilderness: his mercy endures. Who remembered us in our low estate: his mercy endures.

The refrain is the theology: whatever God does, in every domain, across all of history, the constant is mercy, and it does not end.

verse: "O give thanks unto the LORD; for he is good: for his mercy endureth for ever." The opening verse is the frame for everything that follows: the goodness of God expressed as enduring mercy.

No superscription. The Great Hallel. Used at Passover and all major feasts. The structure is among the oldest liturgical forms in the Bible, likely predating the written Psalter. The three-part structure (creation, Exodus/wilderness, land) mirrors the Passover narrative. Nehemiah 9 and Ezra 3:11 echo the refrain.

The congregation as the antiphonal responders; God as creator, deliverer, conqueror, and feeder; creation named (great lights, sun, moon, stars); Egypt and its kings; the defeated nations of Canaan; all flesh fed in the final verse.

Psalm 136 is called the Great Hallel in Jewish tradition and is sung at the Passover Seder. The antiphonal refrain creates a liturgical participation structure: the leader states a divine act, the congregation responds with the theological interpretation. Its influence on Christian worship is incalculable, from the Agnus Dei to modern responsive readings.

For when you want to place every element of your history under the same refrain. The psalm teaches the practice of saying 'his mercy endures forever' after each statement of fact.