On learning his resolve, the sons of Diti and the Danavas, who live in the nether region and who were once defeated by the celestials, fearing that their party would be destroyed without Duryodhana, began a sacrifice with fire to summon him before them. Mantraknowing men then commenced with the formulae of Brihaspati and Ushana. Those rites that are indicated in the Atharvaveda and the Upanishadas and which are capable of being achieved by mantras and prayers.
अथ तं निश्चयं तस्य बुद्ध्वा दैतेयदानवाः॥ पातालवासिनो रौद्राः पूर्वं देवैर्विनिर्जिताः। ते स्वपक्षक्षयं तं तु ज्ञात्वा दुर्योधनस्य वै॥ आह्वानाय तदा चक्रुः कर्म वैतानसम्भवम्। बृहस्पतत्युशनोक्तैश्च मन्त्रैर्मन्त्रविशारदाः॥ अथर्ववेदप्रोक्तैश्च याश्योपनिषदि क्रिया:। मन्त्रजप्यसमायुक्तास्तास्तदा समवर्तयन्॥