Canto 3 -
Araṇya-kāṇḍa
Chapter 24: Lord Rāma Prepares to Fight With Khara’s Army
Text 3.24.7

सम्प्रहारस्तु सुमहान्भविष्यति न संशयः॥

samprahāras tu sumahān bhaviṣyati na saṁśayaḥ

samprahāraḥ tu = war; sumahān = a very great; bhaviṣyati = there will be; na = no; saṁśayaḥ = doubt.

No doubt, there will be a very great war.