You didn't address this to me,but if I may,
Don we now our gay apparel, Fa la la, la la la, la la la. Troll the ancient Yuletide carol, Fa la la la la la, la la la la.
See the bla-zing Yule before us (fa la la ...etc)
Strike the harp and join the cho-rus (fa la la ...etc)
Fol-low me in mer-ry mea-sure (fa la la ...rising ...etc)
While I sing of Yule-tide trea-sure (fa la la ...falling ...etc)
What you cited is the second couplet of the first verse.
Best of the Holiday season to you!