From the early Church Fathers to now.
“For he was standing over them that bound sheaves in the field; and the heat came upon his head, and he died in Bethulia his own city, and was buried there with his fathers.”
“Died. Greek, “fell upon his couch; (Grabe adds, “and died in Betuloua, his own city,”) and they buried him with his fathers, in the field between Dothaim and Balamo.” (Haydock) — These places seem to be added without reason, as they were too remote from Bethulia. (Calmet)”
The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.