It's set to the Gaelic tune Bunesson (the same one used with "Morning Has Broken").
Child in the manger, Infant of Mary,
Outcast and Stranger, Lord of all,
Child Who inherits all our transgressions,
All our demerits on Him fall.
Once the most holy Child of salvation
Gently and lowly lived below.
Now as our glorious mighty Redeemer,
See Him victorious o’er each foe.
Prophets foretold Him, Infant of wonder;
Angels behold Him on His throne.
Worthy our Savior of all our praises;
Happy forever are His own.
