Mantra 3

अथ यदि भ्रातृलोककामो भवति संकल्पादेवास्य भ्रातरः समुत्तिष्ठन्ति तेन भ्रातृलोकेन सम्पन्नो महीयते ॥ ८.२.३ ॥

In plain words

And if he desires the world of the brothers, then by his mere resolve the brothers rise up; and gaining that world of the brothers he is magnified.