अविद्या-पञ्चक, नवसर्ग-क्रमः, प्रजापति-प्रसवः
Vibhaga 1, Adhyaya 5
ऋभुं सनत्कुमारं च ससर्जादौ सनातनः तावूर्ध्वरेतसौ दिव्यौ चाग्रजौ ब्रह्मवादिनौ
ṛbhuṃ sanatkumāraṃ ca sasarjādau sanātanaḥ tāvūrdhvaretasau divyau cāgrajau brahmavādinau
In the beginning, the Eternal One brought forth Ṛbhu and Sanatkumāra. Those two—divine, elder-born, and established in the vow of upward-flowing vitality—were proclaimers of Brahman, devoted to the highest truth.
Suta Goswami (narrating the creation account within the Linga Purana framework)
It establishes that the earliest teachers are purity-centered, Brahman-realization-oriented sages; such inner discipline (ūrdhvareta) is presented as the foundation for approaching the Linga as Pati—the transcendent Lord beyond bondage.
By calling the source “Sanātana” (the Eternal), the verse points to Pati as beginningless reality who emanates enlightened beings—implying Shiva-tattva as the timeless ground from which wisdom and liberation-oriented lineages arise.
The key marker is ūrdhvareta—brahmacarya with conserved and sublimated vital energy—aligned with Pashupata-style inner discipline that supports jñāna (Brahmavāda) and steadiness in worship.