Garudapurana 2.15.59

2.15.59

dugdhaṃ ca mṛnmaye pātre toyaṃ dadyāddinatrayam /
sūrye cāstaṃ gate tārkṣya valabhyāṃ catvare 'pi vā //

And one should offer milk and water in an earthen vessel for three days / at sunset, O Tārkṣya, on the balcony or in the courtyard.