Verse 22

दशामासाद्य सौषुप्तीं स्वचित्ते च विवासनः ।अन्तः शीतलतामेति ज्ञो रसेन यथा शशी

In plain words

Having reached the state of deep sleep, and rid of vāsanā within his own citta, the knower grows cool within, as the moon grows cool through its own rasa.