Although the incident concerning Aghāsura had been performed one year before, when the cowherd boys were five years old, when they were six years old they said, “It happened today.” What happened was this. After killing Aghāsura, Kṛṣṇa, along with His associates the cowherd boys, went for a picnic within the forest. The calves, being allured by green grasses, gradually went far away, and therefore Kṛṣṇa’s associates became a little agitated and wanted to bring back the calves. Kṛṣṇa, however, encouraged the boys by saying, “You take your tiffin without being agitated. I shall go find the calves.” And thus the Lord departed. Then, just to examine the potency of Kṛṣṇa, Lord Brahmā took away all the calves and cowherd boys and kept them in a secluded place.