Todalatantra 3.57

3.57

svastivācanasaṃkalpaṃ ghaṭaṃ saṃsthāpya yatnataḥ
mantreṇācamanaṃ kāryaṃ sāmānyārghyaṃ tato nyaset //

Making the svastivācana and the intention (saṃkalpa), carefully installing the pot, / sipping water with the mantra should be done, and then one should set out the general arghya.