Titus Livius (Livy), The History of Rome, Book 34
Evan T. Sage, Ph.D. Professor of Latin and Head of the Department of Classics in the University of Pittsburgh, Ed.

21. The conqueror then quickly led his troops to the fort of Bergium. This was now primarily a nest of robbers, and from it raids were being made on the pacified districts of this province. [2] A leader of the Bergistani escaped from it to the consul and began to apologize for himself and his fellow-citizens: their own state was not under their control, he said; the robbers, once admitted to the town, had brought it completely under their own dominion. [3] The consul directed him to go back home, having provided himself with a plausible explanation for his absence; [4] when he should see the Romans approaching the walls and the robbers intent on defending the fortifications, he, with the men of his own party, would remember to seize the citadel. [5] This was done according to instructions; suddenly a double terror gripped the barbarians, as on one side the Romans were climbing the walls and on the other the citadel had been taken. The consul took possession of the place and ordered the men who had occupied the citadel and their relatives to be free, and to enjoy possession of their property, and, directing the quaestor to sell the other Bergistani, he put the robbers to death. [6] Having restored order in the province, he arranged for the collection [7] of large revenues from the iron and silver mines, and as a result of the regulations made at that time the wealth of the province increased every day. [8] [p. 471]By reason of these achievements in Spain the Fathers¹ decreed a thanksgiving for three days.²