This is a fantastic version but according to Mark Israel one of thousands to get the words wrong!
God rest you merry, gentlemen" is correct, not "God rest you, merry gentlemen." The verb "rest" is used here in the way now most familiar from the phrase "rest assured". In earlier English it was used with a variety of other complements: the OED has "rest thee merry" from 1400; " rest you well" from1420; "God rest you merry", "rest you fair", and "rest you happy", and "rest myself content" from Shakespeare; "rest thee tranquil" from Shelley, and "rest thee sure" from Tennyson.Full article
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