Śatapatha Brāhmaṇa ("of a hundred paths") 4.5.2.14

4.5.2.14

apa evainamabhyavahareyuḥ | āpo vā asya sarvasya pratiṣṭhā tadenamapsveva pratiṣṭhāpayati tadu vā āhurya enaṃ tatrānuvyāharedapsveva mariṣyatīti tathā haiva syāt

They may throw it into the water, for water is the support of everything here: he thus establishes it in the water. But, say they, if, in that case, any one were to curse him, saying, 'He shall die in water!' then verily it would be so.