Gavāṃ Māhātmya — Go-dāna, Yajña-ādhāra, and Goloka
Brahmā–Indra–Surabhi Itihāsa
समानवत्सां कृष्णां तु धेनुं दत््वा पयस्विनीम् । सुव्रतां वस्त्रसंवीतामग्निलोके महीयते,जो मनुष्य दूध देनेवाली सुलक्षणा कृष्ण वर्णकी गौको वस्त्र ओढ़ाकर कृष्ण वर्णके बछड़ेसहित दान करता है, वह अग्निलोकमें प्रतिष्ठित होता है
samānavatsāṃ kṛṣṇāṃ tu dhenuṃ dattvā payasvinīm | suvratāṃ vastrasaṃvītām agniloke mahīyate ||
वसिष्ठ उवाच— समानवत्सां कृष्णां तु धेनुं दत्त्वा पयस्विनीम् । सुव्रतां वस्त्रसंवीतामग्निलोके महीयते ॥
वसिष्ठ उवाच
The verse teaches the dharmic principle that charity should be complete and respectful: giving a productive cow along with her calf and with proper presentation (clothing/covering) yields great merit, leading to honor in Agni’s realm.
Vasiṣṭha is describing the फल (result) of a specific act of dāna: donating a black, milk-giving cow together with a matching calf, properly adorned/covered, and he states the spiritual reward—exaltation in Agniloka.