Śatapatha Brāhmaṇa ("of a hundred paths") 13.1.3.4

13.1.3.4

īśvaro vā eṣaḥ parāṅ pradaghoryaḥ parācīrāhutīrjuhoti punarāvartate'sminneva loke pratitiṣṭhatyetāṃ ha vāva sa yajñasya saṃsthitimuvācāskandāyāskannaṃ hi tadyaddhutasya skandati

But, verily, he who offers the oblations straight away, would be liable to fall (pass) right away: he turns back again, and establishes himself in this (terrestrial) world. And this indeed he (Pragâpati) has declared to be the perfection of the sacrifice, so as to prevent falling away (spilling), for unspilled is what is spilled of the offered (material).