Rig Veda
स जा॑यत प्रथ॒मः प॒स्त्या॑सु म॒हो बु॒ध्ने रज॑सो अ॒स्य योनौ॑ । अ॒पाद॑शी॒र्षा गु॒हमा॑नो॒ अन्ता॒योयु॑वानो वृष॒भस्य॑ नी॒ळे ॥ स जायत प्रथमः पस्त्यासु महो बुध्ने रजसो अस्य योनौ । अपादशीर्षा गुहमानो अन्तायोयुवानो वृषभस्य नीळे ॥
He is first engendered in the habitation (of the sacrificers); then upon his station, (the altar), the base of the vast firmament; without feet, without head, concealing his extremities, combining with smoke in the nest of the rain-cloud.
english translation