Śatapatha Brāhmaṇa ("of a hundred paths") 3.8.5.10

3.8.5.10

apa evābhyavetya | yatra śuṣkasya cārdrasya ca saṃdhiḥ syāttadupagūhedyadyu abhyavāyanāya glāyedagreṇa yūpamudapātraṃ ninīya yatra śuṣkasya cārdrasya ca saṃdhirbhavati tadupagūhati nāpo nauṣadhīrhiṃsīriti tathā nāpo nauṣadhīrhinasti dhāmnodhāmno rājaṃstato varuṇa no muñca yadāhuraghnyā iti varuṇeti śapāmahe tato varuṇa no muñceti tadenaṃ sarvasmādvaruṇapāśātsarvasmādvaruṇyātpramuñcati

But on going down to the water, let him bury it at the place where the dry and the moist meet. But if he feel disinclined to going down (to the water), he pours out a vessel of water in front of the sacrificial stake and buries (the spit) at the place where the dry and the moist meet, with (Vâg. S. VI, 22), 'Injure thou not the waters nor the plants!' thus it injures neither the waters nor the plants; 'From every fetter --therefrom deliver us, O king Varuna! That they say, we swear by the "Inviolable (cows)," by "Varuna," therefrom deliver us, O Varuna!' Thereby he delivers him from every noose of Varuna, from all (guilt) against Varuna.