1. 15

    सप्तास्यासन् परिधयस्त्रिः सप्त समिधः कृताः । देवा यद्यज्ञं तन्वाना अबध्नन्पुरुषं पशुम् ॥१५॥

    By making seven enclosures with three times seven sacrificial firewood, the deva (the shining one referring to virat) in that yagna (sacrifice of creation), bound the infinite expanse of the purusha as (apparently) finite living beings (pashu).