Śatapatha Brāhmaṇa ("of a hundred paths") 1.9.3.4

1.9.3.4

yadveva pūrṇapātraṃ ninayati | yadvai yajñasya mithyā kriyate vyasya tadvṛhanti kṣaṇvanti śāntirāpastadadbhiḥ śāntyā śamayati tadadbhiḥ saṃdadhāti

And again why he pours out a vessel (of water) is: where anything is done wrongly at the sacrifice, there they tear or wound it; and--water being (a means of) lustration--he lustrates it by that (means of) lustration, water; he heals it with water.