Matsya Purana — Marks of Karma-yoga and the Five Great Daily Sacrifices
तस्मादग्निद्विजमुखान् कृत्वा सम्पूजयेदिमान् दानैर्व्रतोपवासैश्च जपहोमादिना नरः //
tasmādagnidvijamukhān kṛtvā sampūjayedimān dānairvratopavāsaiśca japahomādinā naraḥ //
Therefore, regarding Fire (Agni) and the Brāhmaṇas as the foremost “mouth” through which offerings are received, a man should duly honor them—by gifts, by vows and fasting, and by practices such as mantra-recitation (japa) and fire-offerings (homa).
This verse is not about Pralaya; it teaches everyday dharma—how merit is gained through honoring sacred fire and Brāhmaṇas via charity, vows, fasting, japa, and homa.
It outlines core duties of a householder (and by extension a king as chief patron): support dvijas with dāna, maintain vrata/upavāsa discipline, and perform japa-homa—framing Brāhmaṇas and Agni as primary recipients/mediators of offerings.
The significance is ritual rather than architectural: it emphasizes Agni-centered practice (homa) and allied disciplines (japa, fasting, vows, charity) as the proper means to ‘fully honor’ sacred recipients.