Śivasaṃhitā 3.50

The trembling (kampa) in the second stage and the frog jump (dārdurī) in the third are somatic signs of energy overflowing its habitual channels. These are not anecdotal side effects: they are the symptoms of kuṇḍalinī śakti moving through the cakras, precisely mapped by the Śivasaṃhitā’s internal phenomenology. The text names them so the practitioner recognizes them as progress, not pathology.

Dvitīye (in the second [state]) is ghaṭāvasthā, the vessel stage: prāṇa and apāna, jīva and Brahman begin to unify within the body-vessel. Dārdurī (literally «that of the frog,» from Sanskrit dardura, frog) designates the involuntary jumping that the practitioner experiences when prānic energy surpasses the body’s gravitational weight. Madhyama (the middle one) identifies this as the third stage.

Sixteen prāṇāyāmas as destroyers of past karma reveal the energetic vision of karma in this system: karma is not an abstract record in some cosmic ledger, but real energetic tension crystallized in tissues and channels. Prāṇāyāma, working directly on vital energy, can dissolve that tension with the same concreteness with which fire dissolves cotton — one of the text’s favorite metaphors.