After the killing of the Aghasura demon sent
by Kamsa, Krishna continued to tend the calves with his cowherd boy friends. When they sat down to eat their lunches the calves
wandered off. Krishna assured His friends that He would find them. When Lord Brahma heard how Krishna had killed Aghasura,
he wanted to test his power against Krishna’s. Brahma therefore stole all the boys and calves while Krishna was away
and hid them under his mystic potency. Knowing what Brahma had done, Krishna expanded Himself to duplicate, in every way,
the boys and calves. The duplicates were actually Vishnu expansions. When Krishna returned that evening with the boys and
calves, the mothers and fathers of the boys did not know what had happened. They did not know that Krishna had become their
son. The cows also had more affection for their calves, because the calves had now become Krishna. This went on for one year.
When Brahma returned after the end of the year, he could not understand what had happened. He was bewildered. As he looked
at the duplicate boys and calves, they turned into Vishnu forms. Lord Brahma then fell at the feet of Lord Krishna and begged
forgiveness for his offense. This pastime is mentioned in the Srimad-Bhagavatam, 10th
canto, chapters 13-14.