It may be worth adding that, altho "Rozhenkes mit Mandeln" has been in oral tradition for over a century, it is in origin a show tune! It was in the musical play _Shulamit_ (1880) by Abraham Goldfaden, generally regarded as the father of the Yiddish theater.
It is also, almost certainly, the first song I ever heard. I have a copy of the words in my mother's handwriting, from which she learned it in the hospital while waiting to have me in 1937. When I was little, I was allowed to go around with the bowl of raisins & almonds for the guests at parties.
-- Joe Fineman, email@example.com