Ayurvedamahodadhi (Annapanavidhi section) 74

74

chatrāmṛtaṃ viṣaṃ vajraṃ catvāro vāriṇo guṇāḥ /
bhuktvā tadaiva pratyūṣe abhukte bhojanaiḥ saha // 55 //

Water has four properties: an umbrella, nectar, poison, and a thunderbolt, / [respectively,] having eaten, right at dawn, before eating, and along with meals. // 55