This text comes from The Army and Navy Hymnal, a historical songbook transcribed on Wikisource and reproduced from the pinned revision linked below.
O come, all ye faithful, joyful and triumphant
O come ye, O come ye to Bethlehem;
Come and behold him born the King of angels;
Refrain
O come, let us adore him,
O come, let us adore him,
O come, let us adore him,
Christ, the Lord.
Sing, choirs of angels, sing in exultation,
O sing, all ye bright hosts of heaven above;
Glory to God, all glory in the highest;
Refrain
Yea, Lord, we greet thee, born this happy morning,
Jesus, to thee be all glory given;
Refrain
Amen.