Titus Livius (Livy), The History of Rome, Book 28
Cyrus Evans, Ed.

31. Laelius returned victorious into Carteia; and hearing there what had occurred at Gades, that the plot had been discovered, the conspirators sent to Carthage, and [2??] that the hopes which had brought them there had been completely frustrated, he sent a message to Lucius Marcius, to the effect that, unless they wished to waste time uselessly in lying before Gades, they should return to the general; and Marcius consenting to the proposal, they both returned to Carthage a few days after. [3] In consequence of their departure, Mago not only obtained a temporary relief from the dangers which beset him on all sides, both by sea and land, but also on hearing of the rebellion of the Ilergetians, conceived hopes of recovering Spain, and sent messengers to Carthage to [4??] the senate, who, at the same time that they represented to them in exaggerated terms both the intestine dissension in the Roman camp and the defection of their allies, might exhort them to send succours by which the empire of Spain, which had been handed down to them by their ancestors, might be regained. [5] Mandonius and Indibilis, retiring within their borders, remained quiet for a little time, not knowing what course to take, till they knew what was determined upon respecting the mutiny; but not [p. 1205]distrusting that if Scipio pardoned the error of his own countrymen, they also might obtain the same. [6] But when the severe punishment inflicted came to be generally known, concluding that their offence also would be considered as demanding a similar expiation, they again summoned their countrymen to arms; [7] and assembling the auxiliaries which had joined them before, they crossed over into the Sedetanian territory, where they had had a fixed camp at the beginning of the revolt, with twenty thousand foot and two thousand five hundred horse.