Skandapurana 16.285

Īśvara said:
Then, O great goddess, one should go again to the Nyaṅkumatī river. / Having performed the Gayā-śrāddha there at the excellent tīrtha Goṣpada, // 1

one should then behold Varāha, and from there proceed to the abode of Hari. / Having worshipped the Mothers there, and having bathed at the confluence with the ocean, // 2

where the Nyaṅkumatī meets the sea, one should then proceed eastward / to the divine hermitage of Agastya, known as Kṣudhāhara. // 3

Where the venerable sage, having destroyed Ilvala and Vātāpi, / freed the brahmins from calamities and then granted that place to them. // 4

This is indeed the hermitage of Agastya, dear to Agastya and most excellent, / on the delightful bank of the Nyaṅkumatī, which destroys all sins. // 5

The Goddess said:
For what reason was Vātāpi destroyed here by Agastya? / What was the power of that Daitya who was the slayer of brahmins? / And why did the wrath of the great-souled Agastya arise? // 6

Īśvara said:
There was a lord of the Daityas named Ilvala, O fair-complexioned one, / in the city of Maṇimatī in ancient times, and Vātāpi was his younger brother. // 7

That son of Diti said to a brahmin endowed with austerity: / 'O venerable one, grant me a son equal to Indra.' // 8

When that brahmin did not wish to grant such a son to him, / the son of Diti then became exceedingly angry with that brahmin. // 9

Having arrived at Prabhāsa Field, that wicked-minded Daitya / had Vātāpi, who could change form at will, instantly assume the shape of a ram. // 10

He would cook him and feed him there to the brahmins, desiring to kill them; / and with his voice he would summon him who had gone to destruction. // 11

Assuming his body once more, he would appear alive. / Then, having turned Vātāpi into a well-prepared goat, / and having fed him to a brahmin, he would call him again. // 12

Tearing through the flank of that noble brahmin, / Vātāpi would emerge laughing from the belly of the twice-born. // 13

Having thus fed the brahmins again and again, O goddess, / and bursting their bellies, he would in this manner kill many twice-born. // 14

Then indeed all the brahmins, terrified with fear, ran away; / they went to the hermitage of Agastya and spoke before him: // 15

'Venerable one, listen to our words, which bring fear upon us! / We have all been invited by Ilvala, O lord. // 16

That meal is death itself for us, without doubt. / Therefore, protect us, O venerable one, dejected and dismayed as we are!' // 17

Then, having reached Prabhāsa where those two prominent Daityas were, / the great sage saw the two murderers of brahmins engaged in sin. // 18

Seeing that the great Asura Vātāpi had been prepared in the form of a ram, / he said: 'Give me food, for hunger is upon me.' // 19

Thus addressed, the two of them then bade welcome to the sage: / 'O venerable one, I will give you a meal of great abundance. / How large is your meal? I will cook as much.' // 20

Agastya said:
'Cook the food, O lord of Daityas; there will be some satisfaction [for me].' / Saying 'So be it,' the lord of Daityas announced that it was cooked, O great sage: // 21

'Please sit upon this seat, O sage, and eat at your pleasure.' / Thus addressed, repeating the Aghora mantra that brings about the end of an aeon, / the great sage approached the principal seat and sat down. // 22

The lord of Daityas, Ilvala, served him as if laughing; / he made a heap of food a hundred cubits in size. // 23

Then, delighted in mind, Agastya swallowed two mouthfuls, / having assumed a vast form just as he did when drying up the ocean. // 24

He then consumed all that food, [which was] Vātāpi. / When he had finished eating, the Asura Ilvala called out to him. // 25

Then that one gave food to the high-souled Agastya; / and he reduced to ashes all that food along with the Dānava. // 26

The great sage reduced Ilvala to ashes with a fist of wrath. / Then, uttering cries of woe, all the Daityas perished. // 27

Then the immensely splendid Agastya, having summoned the excellent twice-born, / gave them that place, which was filled with the wealth of the Daityas. // 28

Thus, O goddess, Agastya's hunger was removed there by the Dānavas; / because of that, it became a place for the twice-born named Kṣudhāhara. // 29

On its western side, situated not very far away, / is that which is known as Gaṅgeśvara, installed by Gaṅgā. // 30

Formerly, upon consuming Vātāpi, the high-souled Agastya, / in order to purify all the sin arising from eating the Daitya, / summoned Gaṅgā, the destroyer of sins, O great goddess. // 31

Then, O goddess, Gaṅgā, the destroyer of sins, arrived; / she purified that seer and remained at that place. // 32

In Agastya's delightful hermitage, which removes the fear of sin for men, / by seeing Gaṅgeśvara there, through bathing, giving gifts, reciting mantras, and the like, / one is freed from the sin born of eating forbidden food; of this there is no doubt. // 33

Thus ends the two hundred and eighty-fifth chapter, titled 'Description of the Māhātmya of Agastyāśrama and Gaṅgeśvara in the Nyaṅkumatī-māhātmya', in the first [part], the Prabhāsa-kṣetra-māhātmya, of the seventh [section], the Prabhāsakhaṇḍa, in the glorious Skanda Mahāpurāṇa consisting of eighty-one thousand verses.