Valmiki Ramayana Sundara Kanda Sarga 58 Shloka 108

ततः that, तदा then, मे I, कायः body, पर्वतसन्निभः like a mountain, अवर्धत increased, युद्धकाङ्क्षी intent on fighting, तत् that, वनम् garden, विनाशयितुम् to destroy, आरभे started.

"Thereafter, I increased my body to the size of a mountain, intent on fighting and started destroying the pleasure garden.