Valmiki Ramayana Sundara Kanda Sarga 14 Shloka 12
Original Shlokaदिशस्सर्वाः प्रधावन्तं वृक्षषण्डगतं कपिम्। दृष्ट्वा सर्वाणि भूतानि वसन्त इति मेनिरे।।5.14.12।।
1 source checked for this shloka
दृष्ट्वा beholding, दिशस्सर्वाः in all directions, प्रधावन्तं running, वृक्षषण्डगतं variegated flowers shed by trees, कपिम् monkey (Hanuman), सर्वाणि all, भूतानि living beings, वसन्त spring, इति मेनिरे this is spring
Beholding that sprightly monkey running in all directions, its body covered with variegated blossoms fallen from the trees, all living beings there thought that it was Spring personified