Matsya Purana — Kailasa
यज्ञादपेतः सुमहान् अमितौजाः सुविक्रमः तत्रागस्त्यैः परिवृता विद्वभिर्द्ब्रह्मराक्षसैः //
yajñādapetaḥ sumahān amitaujāḥ suvikramaḥ tatrāgastyaiḥ parivṛtā vidvabhirdbrahmarākṣasaiḥ //
There, Agastya—most great, of immeasurable vigor and mighty prowess—had turned away from the sacrifice, and was surrounded by learned brahmarākṣasas.
This verse does not discuss pralaya; it focuses on a ritual setting (yajña) and the presence of brahmarākṣasas around Agastya, emphasizing moral-ritual consequences rather than cosmic dissolution.
It underscores the dharmic principle that sacrifice must be approached with purity and right conduct; even learned status can degrade into brahmarākṣasahood if ritual power is misused—an ethical warning relevant to householders and rulers who sponsor yajñas.
The ritual significance is central: the verse situates the narrative at a yajña and highlights withdrawal/cessation from the sacrifice, implying a disruption in proper ritual order and the ominous presence of brahmarākṣasas.