Possible Clues:

• 'O Come, ___ Faithful'
• "O Come ___ Faithful"
• ''O Come, __ Faithful''
• "O come, --- faithful"
• 'Come-faithful' filler
• "Come-faithful" filler
• "Joyful, __ nations, rise": carol lyric
• 'Joyful, __ nations, rise': carol lyric
• "O Come, __ Faithful"
• 'O come, ___ ...'