Matsya Purana — The Observance of Ananta-Tritiya
मिथुनानि चतुर्विंशद् दश द्वो च समर्चयेत् अष्टौ षड्वाप्यथ पुनश् चानुमासं समर्चयेत् //
mithunāni caturviṃśad daśa dvo ca samarcayet aṣṭau ṣaḍvāpyatha punaś cānumāsaṃ samarcayet //
One should duly worship in paired sets—twenty-four, ten, and also two; likewise eight and six; and again one should perform the worship month by month.
This verse is not about Pralaya; it is a prescriptive rule for organizing worship by specific numerical groupings and repeating it on a monthly cycle.
It frames dharmic discipline as regular, structured worship: a householder (and by extension a king) should maintain consistent monthly observances and orderly ritual performance rather than sporadic devotion.
The significance is ritual: it specifies a counted sequence of worship in paired sets (mithuna) and emphasizes anumāsa—repeating the worship month-by-month—suggesting a calendrical puja schedule.