A new line of wafers named after a popular Chasidic melody was recently certified kosher by Russian Chief Rabbi Berel Lazar, a Chabad-Lubavitch emissary and director of the Federation of Jewish Communities of the Former Soviet Union.

Called “7:40,” the candied bars refer to the translated Russian name of “Sem Sorok,” a melody with a disputed genesis that also goes by its Yiddish name, zibn fertsik. Some contend that the numerical title is a reference to the latest train that Jews could catch to leave Odessa by the 8:00 curfew. Others insist, however, that the source of the name really refers to the year 1947, when a train station opened in Kiev, allowing Jews to commute more easily to Odessa.

Apparently not weighing in on the controversy, the wafers’ manufacturer chose to adorn the snack’s package with pictures of a train and passengers waiting to board.