Adhyaya 89: शौचाचारलक्षणम् — सदाचार, भैक्ष्यचर्या, प्रायश्चित्त, द्रव्यशुद्धि, आशौच-निर्णय
बेहविओउर् ओफ़् अ योगिन् योगिनां चैव सर्वेषां श्रेष्ठं चान्द्रायणं भवेत् एकं द्वे त्रीणि चत्वारि शक्तितो वा समाचरेत्
behaviour of a yogin yogināṃ caiva sarveṣāṃ śreṣṭhaṃ cāndrāyaṇaṃ bhavet ekaṃ dve trīṇi catvāri śaktito vā samācaret
Para un yogui—y, en verdad, entre todos los yoguis—la observancia del Cāndrāyaṇa se declara la más excelsa. Según la propia capacidad, debe emprenderse una, dos, tres o incluso cuatro veces, como purificación interior que sostiene la bhakti firme hacia Pati (Śiva) y afloja el pāśa que ata al paśu (el alma individual).
Suta Goswami (narrating the Linga Purana’s teaching to the sages at Naimisharanya)
It elevates the Cāndrāyaṇa vrata as a premier purifier for practitioners, making the worshipper fit for steady Śiva-bhakti and disciplined Linga-upāsanā by reducing impurity and strengthening restraint.
By implying Śiva as Pati—the supreme Lord—whose realization is supported by purification; the soul (pashu) approaches Śiva-tattva as bonds (pāśa) are weakened through such observances.
The Cāndrāyaṇa observance (a lunar-cycle penance/discipline) is highlighted, to be undertaken according to one’s strength, even repeatedly (up to four times) for deeper purification.