Adhyaya 89: शौचाचारलक्षणम् — सदाचार, भैक्ष्यचर्या, प्रायश्चित्त, द्रव्यशुद्धि, आशौच-निर्णय
अष्टाब्दाद् एकरात्रेण शुद्धिः स्याद् बान्धवस्य तु द्वादशाब्दात्ततश्चार्वाक् त्रिरात्रं स्त्रीषु सुव्रताः
aṣṭābdād ekarātreṇa śuddhiḥ syād bāndhavasya tu dvādaśābdāttataścārvāk trirātraṃ strīṣu suvratāḥ
对亲族而言,年满八岁之后,死秽之净化以一夜而成;但自十二岁起,若为持善誓之女(suvratā),则当守净三夜。
Suta Goswami
It sets the minimum purification periods after bereavement, indicating when a devotee may properly return to Shiva-puja and Linga-archana without the बाधा (ritual obstruction) of ashauca.
Implicitly, it presents Shiva as Pati—the Lord approached through ordered dharma: purity disciplines regulate the devotee’s readiness to re-enter worship, so the pashu (bound soul) moves from disturbance toward sattvic steadiness.
Ritual discipline (niyama) regarding ashauca-shuddhi—observing one-night or three-night purification—so that Shiva-puja and related vows can be resumed in the proper state.