Matsya Purana — The Karmic Cause of Purūravas’ Beauty and Fortune
धेन्वाः प्रसूयमानायाः फलं दानस्य मे श्रुतम् कृष्णाजिनप्रदानं च वृषोत्सर्गस्तथैव च //
dhenvāḥ prasūyamānāyāḥ phalaṃ dānasya me śrutam kṛṣṇājinapradānaṃ ca vṛṣotsargastathaiva ca //
I have heard of the reward that comes from gifting a cow at the time she is about to give birth; likewise I have heard of the merit of giving a black antelope-skin (kṛṣṇājina) and of releasing a bull (vṛṣotsarga) in consecrated donation.
This verse does not address pralaya or cosmology; it focuses on dāna-dharma—specific charitable acts and their religious merit.
It highlights high-merit gifts recommended for a gṛhastha (and supported by kings through patronage): donating a cow at a sensitive, life-giving moment (calving), gifting protective/ascetic items like kṛṣṇājina, and performing vṛṣotsarga—acts seen as sustaining social and ritual order.
The ritual element is vṛṣotsarga (bull-release donation), a formal charitable rite often connected with vows, expiations, and merit-making; no Vāstu or temple-architecture rule is stated in this verse.