ipse audito castellum Lupiae flumini adpositum obsideri, sex legiones eo duxit. [...] neque Caesari copiam pugnae opsessores fecere, ad famam adventus eius dilapsi
Translation :
He himself, on hearing that a fort on the river Luppia was being besieged, led six legions to the spot. [...] And Caesar had no opportunity of fighting given him by the besiegers, who dispersed on the rumour of his advance.
Edition :
Annales ab excessu divi Augusti. Cornelius Tacitus. Charles Dennis Fisher. Clarendon Press. Oxford. 1906.
Complete Works of Tacitus. Tacitus. Alfred John Church. William Jackson Brodribb. Sara Bryant. edited for Perseus. New York. : Random House, Inc. Random House, Inc. reprinted 1942.
Remark :
long-term consequence: The besiegers had destroyed two altars raised to honor Varus' legions, which were restored by Germanicus (2.7).