Matsya Purana — Saubhagya-Śayana Vow: Lalitā/Gaurī–Śiva Worship
ज्येष्ठे मन्दारकुसुमं बिल्वपत्त्रं शुचौ स्मृतम् श्रावणे दधि संप्राश्यं नभस्ये च कुशोदकम् //
jyeṣṭhe mandārakusumaṃ bilvapattraṃ śucau smṛtam śrāvaṇe dadhi saṃprāśyaṃ nabhasye ca kuśodakam //
In the month of Jyeṣṭha, one should offer mandāra flowers; in Śuci (Āṣāḍha), bilva leaves are prescribed. In Śrāvaṇa one should partake of curd (dadhi), and in Nabhasya (Bhādrapada) one should use water sanctified with kuśa grass (kuśodaka).
This verse does not describe pralaya; it belongs to a ritual-calendar instruction section, prescribing month-wise offerings and purificatory items for regular dharmic observance.
It frames dharma as disciplined, time-bound practice: a householder (and by extension a king setting public norms) maintains religious order through month-specific worship materials and regulated dietary/ritual acts like taking curd in Śrāvaṇa and using kuśa-purified water in Nabhasya.
Ritually, it specifies proper upacāra materials by month—mandāra flowers, bilva leaves, and kuśa-water—indicating seasonal liturgical correctness in pūjā and purification (śuddhi) procedures rather than temple architecture.