Matsya Purana — Measures of Time: Caturyuga Computation
संहिताश्च तथा मन्त्रा ऋषिभिर् ब्रह्मणः सुतैः यज्ञः प्रवर्तितश्चैव तदा ह्येव तु दैवतैः //
saṃhitāśca tathā mantrā ṛṣibhir brahmaṇaḥ sutaiḥ yajñaḥ pravartitaścaiva tadā hyeva tu daivataiḥ //
The Saṃhitās and the mantras were likewise set forth by the seers, the sons of Brahmā; and at that very time the gods themselves caused the sacrificial rite (yajña) to be established in practice.
It emphasizes restoration of cosmic and social order after upheaval: Vedic Saṃhitās, mantras, and yajña are (re)established through Brahmā’s line of ṛṣis with divine support—an indicator of dharma being re-founded after disorder such as pralaya.
By grounding authority in Veda and yajña, it implies that rulers and householders uphold dharma through sanctioned rites—supporting sacrificial ceremonies, patronizing learned ṛṣis, and maintaining the ritual economy that sustains society.
Ritually, it asserts the divine-ṛṣi provenance of mantras and yajña, which are prerequisites for consecrations and temple rites; in Vāstu/temple practice, correct mantra and yajña procedure legitimizes construction rituals (adhiṣṭhāna, prāṇa-pratiṣṭhā) even if architecture is not named directly.