It is by sacrifice that Soma is got. Sacrifice has been fixed upon kine. The gods become pleased through sacrifices. The means of livelihood were created first, creatures came next.
यज्ञैरवाप्यते सोमः स च गोषु प्रतिष्ठितः। ततो देवाः प्रमोदन्ते पूर्वं वृत्तिस्ततः प्रजाः॥