Valmiki Ramayana Sundara Kanda Sarga 54 Shloka 1

ततः then, कृतमनोरथः objectives achieved, कपिः monkey, लङ्काम् Lanka, वीक्षमाणः gazing, वर्धमानसमुत्साहः growing zeal, कार्यशेषम् remaining work, अचिन्तयत् pondered over.

With his objectives achieved, the monkey gazed at Lanka with growing zeal and pondered over the remaining work. Hanuman destroys the Ashoka garden -- sets fire to Lanka -- kills demons