The demon Aghāsura appeared before Kṛṣṇa and His friends. Aghāsura happened to be the younger brother of Pūtanā and Bakāsura, and he thought, “Kṛṣṇa has killed my brother and sister. Now I shall kill Him along with all His friends and calves.” Aghāsura was instigated by Kaṁsa, so he had come with determination. Aghāsura also thought that when he would offer grains and water in memory of his brother and sister and kill Kṛṣṇa and all the cowherd boys, then automatically all the inhabitants of Vṛndāvana would die. Generally, for the householders, the children are the life and breath force. When all the children die, then naturally the parents also die on account of strong affection for them.
Aghāsura, thus deciding to kill all the inhabitants of Vṛndāvana, expanded himself by the yogic siddhi called mahimā. The demons are generally expert in achieving almost all kinds of mystic powers. In the yoga system, by the perfection called mahimā-siddhi, one can expand himself as he desires. The demon Aghāsura expanded himself up to eight miles and assumed the shape of a very fat serpent. Having attained this wonderful body, he stretched his mouth open just like a mountain cave. Desiring to swallow all the boys at once, including Kṛṣṇa and Balarāma, he sat on the path.
The demon in the shape of a big fat serpent expanded his lips from land to sky; his lower lip was touching the ground, and his upper lip was touching the clouds. His jaws appeared like a big mountain cave, without limitation, and his teeth appeared just like mountain summits. His tongue appeared to be a broad traffic way, and he was breathing just like a hurricane. His eyes were blazing like fire. At first the boys thought that the demon was a statue, but after examining it they saw that it was a big serpent lying down on the road and widening his mouth. The boys began to talk among themselves: “Dear friends, this figure appears to be a great animal, and he is sitting in such a posture just to swallow us all. Just see—is it not a big snake that has widened his mouth to eat all of us?”
One of them said, “Yes, what you say is true. This animal’s upper lip appears to be just like the sunshine, and its lower lip is just like the reflection of red sunshine on the ground. Dear friends, just look to the right- and left-hand side of the mouth of the animal. Its mouth appears to be like a big mountain cave, and its height cannot be estimated. The chin is also raised just like a mountain summit. That long highway appears to be its tongue, and inside the mouth it is as dark as in a mountain cave. The hot wind that is blowing like a hurricane is his breathing, and the fishy bad smell coming out from his mouth is the smell of his intestines.”
Then they further consulted among themselves: “If we all at one time entered into the mouth of this great serpent, how could it possibly swallow all of us? And even if it were to swallow all of us at once, it could not swallow Kṛṣṇa. Kṛṣṇa will immediately kill him, as He did Bakāsura.” Talking in this way, all the boys looked at the beautiful lotuslike face of Kṛṣṇa, and they began to clap and smile. And so they marched forward and entered the mouth of the gigantic serpent.
Meanwhile, Kṛṣṇa, who is the Supersoul within everyone’s heart, could understand that the big statuesque figure was a demon. The boys did not know this, however, and thus while Kṛṣṇa was planning how to stop the destruction of His intimate friends, all the boys along with their calves entered the mouth of the serpent. But Kṛṣṇa did not enter. The demon was awaiting Kṛṣṇa’s entrance, and he was thinking, “Everyone has entered except Kṛṣṇa, who has killed my brother and sister.”