Verse 20

अस्मिन्नवसरे यावद्बुध्यस्वेत्यवदद्विभुः ।प्रबुद्धस्तावदेषोऽभूद्बर्ही घनरवादिव

In plain words

At that very moment, as soon as the Lord said 'Awake!', at once he became fully awake -- as a peacock wakes at the sound of thunderclouds.