कतम इन्द्रः कतमः प्रजापतिरितिस्तनयित्नुरेवेन्द्रो यज्ञः प्रजापतिरिति क-तमः स्तनयित्नुरित्यशनिरिति कतमोयज्ञ इति पशव इति ॥ ६ ॥
In plain words
‘Which one is Indra, and which is Prajāpati?’ Thunder itself is Indra; sacrifice is Prajāpati. ‘And which is thunder?’ ‘The thunderbolt.’ ‘And which is sacrifice?’ ‘The animals offered in it.’
Close to the Sanskrit
'Which is Indra, which is Prajāpati?' — Thunder alone is Indra, sacrifice is Prajāpati. 'Which is thunder?' — 'The thunderbolt.' 'Which is sacrifice?' — 'The sacrificial animals.'