Śatapatha Brāhmaṇa ("of a hundred paths") 3.9.4.5

3.9.4.5

gabhīramimamadhvaraṃ kṛdhīti | adhvaro vai yajño mahāntamimaṃ yajñaṃ kṛdhītyevaitadāhendrāya suṣūtamamitīndro vai yajñasya devatā tasmādāhendrāyeti suṣūtamamiti susutamamityevaitadāhottamena pavinetyeṣa vā uttamaḥ paviryatsomastasmādāhottamena pavinetyūrjasvantam madhumantam payasvantamiti rasavantamityevaitadāha yadāhorjasvantam madhumantam payasvantamiti

'Perform thou this deep cult!' Cult means sacrifice; he thereby means to say, 'Perform thou this great sacrifice!'--'well-gotten for Indra;' by 'well-gotten' he means to say, 'well-produced;' and Indra is the deity of the sacrifice, wherefore he says, 'for Indra;'--'by the most excellent bolt,' for he, Soma, is indeed the most excellent bolt, therefore he says, 'by the most excellent bolt;'--'the (cult) rich in food and sweetness and drink,' whereby he means to say, 'the (cult) rich in sap.'