Vishnupurana 5.23.16

5.23.16

bahir āvasite sainye mathurāyā nirāyudhaḥ
nirjagāma sa govindo dadṛśe yavaneśvaram //

When the hostile army encamped round Mathura, Krishńa unarmed went forth, and beheld the Yavana king. Kálayavana, the strong-armed, recognizing Vásudeva, pursued him; him whom the thoughts of perfect ascetics cannot overtake. Thus pursued, Krishńa entered a large cavern, where Muchukunda, the king of men, was asleep. The rash Yavana entering the cave, and beholding a man lying asleep there, concluded it must be Krishńa, and kicked him; at which Muchukunda awoke, and casting on him an angry glance, the Yavana was instantly consumed, and reduced to ashes. For in a battle between the gods and demons, Muchukunda had formerly contributed to the defeat of the latter; and, being overcome with sleep, he solicited of the gods as a boon that he should enjoy a long repose. "Sleep long and soundly," said the gods; "and whoever disturbs you shall be instantly burnt to ashes by fire emanating from your body."