From Appian's History of Rome: The Illyrian Wars
[§5] Such was the punishment which the god visited upon the Illyrians and the Celts for their impiety.  But they did not desist from temple robbing, for again, in
conjunction with the Celts, certain Illyrian tribes, especially the Scordisci, the Maedi, and the Dardani again invaded Macedonia and
Greece together, and plundered many temples, including that of Delphi, but losing many men this time also.
 The Romans, thirty-two years after their first encounter with the Celts, having fought with them at intervals since that time, now, under the leadership of Lucius [Cornelius] Scipio, made war against the Illyrians, on account of this temple robbery, as the Romans now held sway over the Greeks and the Macedonians.