The army of the consul Fabius was so small that Bituitus boasted that the small number of the Romans would scarcely suffice to feed the dogs that were with his army.
Fabius consul...adeo cum paruo exercitu occurrit, ut Bituitus paucitatem Romanorum uix ad escam canibus, quos in agmine habebat, sufficere posse iactaret.
Original text (Latin)
Source, in full
Orosius, Seven Books of History Against the Pagans, bk. 5, ch. 1 (tr. I. W. Raymond, 1936). Turned into a direct quote in Jules Michelet, History of France, tr. G. H. Smith (1882), vol. i, p. 40: "There are not enough there to serve my dogs for one meal."