Verse 49

निद्राव्यपगमे तस्य भावयामास तन्मनः ।व्योमश्यामलदृग्जन्तुर्नभसीव शिखण्डकान्

In plain words

When sleep had departed from him, that mind of his fell to imagining — as a creature whose sight is dark as the sky imagines peacock-plumes in the sky.