Secondary Creation Begins: Brahmā’s Productions, the Guṇas, and the Emergence of Orders of Beings
जगृहुस्तद्विसृष्टां तां जृम्भणाख्यां तनुं प्रभो: । निद्रामिन्द्रियविक्लेदो यया भूतेषु दृश्यते । येनोच्छिष्टान्धर्षयन्ति तमुन्मादं प्रचक्षते ॥ ४१ ॥
jagṛhus tad-visṛṣṭāṁ tāṁ jṛmbhaṇākhyāṁ tanuṁ prabhoḥ nidrām indriya-vikledo yayā bhūteṣu dṛśyate yenocchiṣṭān dharṣayanti tam unmādaṁ pracakṣate
The ghosts and fiends seized the body that Lord Brahmā cast off as ‘yawning’ (jṛmbhaṇā). This is the sleep that moistens the senses and brings drooling. When they assail the impure, that affliction is called madness (unmāda).
The disease of insanity or being haunted by ghosts takes place in an unclean state of existence. Here it is clearly stated that when a man is fast asleep and saliva flows from his mouth and he remains unclean, ghosts then take advantage of his unclean state and haunt his body. In other words, those who drool while sleeping are considered unclean and are subject to be haunted by ghosts or to go insane.
This verse links sleep to a manifested potency/form (Jṛmbhaṇā) through which the senses become dulled and slack, a tamasic condition observed in embodied beings.
The verse defines unmāda as the state in which one loses proper discrimination and becomes shameless—so much so that one transgresses boundaries related to cleanliness and propriety.
Recognize excessive sleep and shameless, impulsive behavior as signs of tamas; counter them with regulated habits, purity, and devotional practices that strengthen clarity and self-control.