The Canticle of the Three Young Men (Daniel 3:52-56) is not a psalm from the Book of Psalms but a deuterocanonical canticle found in the Greek additions to the Book of Daniel. It forms part of the longer Song of the Three Young Men (Daniel 3:24-90 in Catholic Bibles), sung by Shadrach, Meshach, and Abednego while standing unharmed in the fiery furnace ordered by King Nebuchadnezzar. This canticle likely originated in the Hellenistic period (2nd century BC) during times of Jewish persecution under Antiochus IV Epiphanes. It draws on ancient blessing formulas (berakhot) and Temple liturgy, expressing faithful resistance to idolatry and profound trust in God’s saving presence. Its style echoes the Psalms of praise while expanding into a cosmic hymn that blesses God across all realms of creation and glory.

The selected verses (52-56) with the response “To be praised and highly exalted for ever!” (or “Glory and praise for ever!”) constitute a litany of adoration. It blesses the Lord as “the God of our ancestors,” His holy and glorious name, in the temple of His holy glory, on the throne of His kingdom, and as the one who looks into the depths while seated upon the cherubim, extending even to the firmament of heaven. This creates a majestic ascent of praise that acknowledges God’s transcendence and immanence.

In the Roman Catholic Lectionary, this canticle is appointed as the Responsorial Psalm for the Solemnity of The Most Holy Trinity, Year A. Its use is particularly apt for a feast that celebrates the mystery of the one God in three Persons. The readings for Year A (Exodus 34:4b-6, 8-9; 2 Corinthians 13:11-13; John 3:16-18) emphasise God’s merciful self-revelation, the Trinitarian blessing, and the sending of the Son. The canticle’s repeated blessings of God in His various dwelling places beautifully reflect the Trinitarian life: the Father on the throne, the Son in the temple of His glory (echoing the Incarnation), and the Spirit who searches the depths.

As a non-Psalm canticle, it enriches the liturgy by drawing from the Church’s fuller canon and reminds worshippers that the “Responsorial Psalm” slot can include other biblical songs when they serve the mystery of the day. For the assembly, it invites participation in the eternal praise of the Trinity, linking the deliverance of the three young men in the furnace to the saving work of the Triune God who rescues humanity through Christ. On Trinity Sunday, it calls the Church to join creation in blessing the God whose merciful love is revealed fully in Father, Son, and Holy Spirit.