महाबल: powerful one, वयम् we, इह: here, प्राप्तान् on arriving, तम: him, सर्वान् all, शत्रून् enemies, शस्त्रप्रतापेन: by the strength of arms, वशे: bring under your control, करिष्यामः will do, संशयः doubt, न: not.

"O Ravana of extraordinary strength We will bring all your enemies under control on their arrival here. There is no doubt."