Valmiki Ramayana Yuddha Kanda Sarga 60 Shloka 59

उत्तिष्ठतः as he woke up, कुम्भकर्णस्य Kumbhakarna's, तत् रूपम् form, युगान्ते universal dissolution, सबलाकस्य twilight, सर्वभूतानि all beings, मेघस्येव like cloud, विवर्षितः about to rain, बभौ appeared.

As Kumbhakarna woke up he appeared like the time spirit at the time of dissolution of the universe like a rainy cloud at twilight as if seeking to consume all beings.