When Vasudeva saw his extraordinary son, his eyes were struck with wonder. In transcendental jubilation, he mentally collected ten thousand cows and distributed them among the brāhmaṇas as a transcendental festival.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
स विस्मयोत्फुल्लविलोचनो हरिं सुतं विलोक्यानकदुन्दुभिस्तदा । कृष्णावतारोत्सवसम्भ्रमोऽस्पृश- न्मुदा द्विजेभ्योऽयुतमाप्लुतो गवाम्
sa vismayotphullavilocano hariṃ sutaṃ vilokyānakadundubhistadā | kṛṣṇāvatārotsavasambhramo'spṛśa- nmudā dvijebhyo'yutamāpluto gavām
SB 10.3.11