Matsya Purana — The Observance of Ananta-Tritiya
सिन्दूरकुङ्कुमस्नानम् अतीवेष्टतमं यतः तथोपदेष्टारमपि पूजयेद्यत्नतो गुरुम् न पूज्यते गुरुर्यत्र सर्वास्तत्राफलाः क्रियाः //
sindūrakuṅkumasnānam atīveṣṭatamaṃ yataḥ tathopadeṣṭāramapi pūjayedyatnato gurum na pūjyate gururyatra sarvāstatrāphalāḥ kriyāḥ //
Since bathing and adorning oneself with vermilion (sindūra) and saffron (kuṅkuma) is held to be exceedingly cherished, so too should one diligently honor the Guru—the very instructor. Where the Guru is not revered, all actions and rites performed there become fruitless.
This verse is not about Pralaya; it teaches ethical-ritual causality: neglect of the Guru nullifies the spiritual efficacy of one’s rites.
It frames a core duty of both rulers and householders: honoring the teacher who imparts dharma and ritual knowledge; without such respect, religious observances and meritorious acts are said to yield no fruit.
The ritual point is explicit: external ritual adornment (sindūra/kuṅkuma bathing) is secondary to honoring the Guru; guru-pūjā is presented as a prerequisite for rites to succeed.