Shatapatha Brahmana 13.1.7.1

13.1.7.1

prajāpatirakāmayata aśvamedhena yajeyeti so'śrāmyatsa tapo'tapyata tasya śrāntasya taptasya saptadhātmano devatā apākrāmantsā dīkṣābhavatsa etāni vaiśvadevānyapaśyattānyajuhottairvai sa dīkṣāmavārunddha yadvaiśvadevāni juhoti dīkṣāmeva tairyajamāno'varunddhe'nvahaṃ juhotyanvahameva dīkṣāmavarunddhe sapta juhoti sapta vai tā devatā apākrāmaṃstābhirevāsmai dīkṣāmavarunddhe

Pragâpati desired, 'Might I perform a horse-sacrifice?' He toiled and practised fervid devotion. From the body of him, when wearied and heated, the deities departed in a sevenfold way: therefrom the Dîkshâ (initiation) was produced. He perceived those Vaisvadeva (oblations). He offered them, and by means of them he gained the Dîkshâ: and when the Sacrificer offers the Vaisvadeva (oblations) it is the Dîkshâ he thereby gains. Day after day he offers them: day after day he thus gains the Dîkshâ. Seven of them he offers; for seven were those deities that departed (from Pragâpati); it is by means of them that he (the priest) gains the Dîkshâ for him.