SB 8.16.39
arcitva gandha-malyadyaih
payasa snapayed vibhum
vastropavitabharana-
padyopasparsanais tatah
gandha-dhupadibhis carced
dvadasaksara-vidyaya
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
In the beginning, the devotee should chant the dvadasaksara-mantra and offer flower garlands, incense and so on. After worshiping the Lord in this way, one should bathe the Lord with milk and dress Him with proper garments, a sacred thread, and ornaments. After offering water to wash the Lord’s feet, one should again worship the Lord with fragrant flowers, incense and other paraphernalia.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The dvadasaksara-mantra is om namo bhagavate vasudevaya. While worshiping the Deity, one should ring a bell with his left hand and offer padya, arghya, vastra, gandha, mala, abharana, bhusana and so on. In this way, one should bathe the Lord with milk, dress Him and again worship Him with all paraphernalia.