Serving the Deity

Bathe before you serve the Deity

Bathe, and wash your hands and feet, before you touch the Deity or serve on the altar.

Serving the Deity is an intimate service, and it asks for a clean body and a calm mind. The Nectar of Devotion lists touching the Deity before bathing, and entering the temple without washing the hands and feet, among the offenses to avoid.

Whose teaching
Varāha Purāṇa
Where it is taught
The Nectar of Devotion, ch. 8 (offenses from the Varāha Purāṇa)
Source
Vedabase
Bathe before you serve the Deity · HariHariBol