And Hari obliged with energy the king of serpents; and the Lord invigorated the immortals with another energy. And on the milky-sea being churned by the celestials and the Asuras, first came into existence Surabhi, worshipped of the celestials,—home of clarified butter. And thereat both the deities and the Dānavas experienced very great delight, O great ascetic; and with their minds attracted, they steadily gazed at her.

In plain words: Vishnu gave strength to the serpent and to the gods. As the churning went on, the first thing to rise was Surabhi, the holy cow who gives butter for offerings. Gods and demons alike were thrilled and stared at her.