Lyric's tae the song. These are almost verbatim passages from Robert Burns' poem of the same name. Tis in Rabbie's blend of Auld Scot's and English.

Was thinking of posting the lyrics directly here but nay, they're too many to fit nicely. So here is an external link to the lyrics for those interested.
https://genius.com/The-real-mckenzies-halloween-lyricshttps://genius.com/The-real-mckenzies-halloween-lyrics