The Great Epic of the Bhārata dynasty 13.85.9

13.85.9

tasya śukrasya niṣpandātpāṃsūnsaṃgṛhya bhūmitaḥ |
prāsyatpūṣā karābhyāṃ vai tasminneva hutāśane || 9 ||

That illustrious deity is called by various names. Even He is Brahman and Siva and Rudra and Varuna and Agni and Prajapati. He is the auspicious Lord of all creatures. Sacrifice (in his embodied form), and Penance, and all the union rites, and the goddess Diksha blazing with rigid observances, the several points of the compass with the deities that respectively preside over them, the spouses of all the deities, their daughters, and the celestial mothers, all came together in a body to Pasupati, O perpetuator of Bhrigu's race. Verily, beholding that sacrifice of the high-souled Mahadeva who had assumed the form of Varuna, all of them became highly pleased. Seeing the celestial damsels of great beauty, the seed of Brahman came out and fell upon the earth. In consequence of the seed having fallen on the dust, Pushan (Surya) took up that dust mixed with the particles of seed from the earth with his hands and cast it into the sacrificial fire. Meanwhile, the sacrifice with the sacred fire of blazing flames was commenced and it went on. Brahman (as the Hotri) was pouring libations on the fire. While thus employed, the grandsire became excited with desire (and his seed came out). As soon as that seed came out, he took it up with the sacrificial ladle and poured it as a libation of ghee, O delighter of the Bhrigus, with the necessary Mantras, on the blazing fire. From that seed, Brahman of great energy caused the four orders of creatures to spring into existence.