Garudapurana 1.119

The glorious Garuḍa Mahāpurāṇa — 119 / Brahmā said: / I shall describe the Agastyārghya observance, which bestows enjoyment and liberation. / When the sun has not yet reached Virgo, when three days remain in the degree,

One should offer an arghya to Agastya, having worshipped his image, O sage, / made of kāśa flowers, placed upon a pot, having kept vigil at twilight.

Having worshipped with curds, unbroken grains, and the like, fasting, with fruits and flowers, / [preparing a vessel] filled with five colours, provided with gold and silver,

A vessel containing seven grains, smeared with curds and sandalwood paste, / one should offer the arghya with the mantra beginning ‘Agastyaḥ khanamānaḥ’:

‘O you who resemble the kāśa flower, born of fire and wind, / son of Mitra and Varuṇa, pitcher-born one, salutations to you!’

A Śūdra, a woman, and others should, through this alone, give up grain, fruit, and liquids; / one should give a pot accompanied by gold and accompanied by a priestly gift to a twice-born, / and feed seven twice-born; having performed this for a year, one enjoys all things.

Thus in the glorious Garuḍa Mahāpurāṇa, in the first section named the Ācārakāṇḍa of the first part, the hundred and nineteenth chapter, entitled ‘The Religious Observance of Agastyārghya’.