tatas ca saurir bhagavat-pracoditah
sutam samadaya sa sutika-grhat
yada bahir gantum iyesa tarhy aja
ya yoga-mayajani nanda-jayaya
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Thereafter, exactly when Vasudeva, being inspired by the Supreme Personality of Godhead, was about to take the newborn child from the delivery room, Yoga-maya, the Lord’s spiritual energy, took birth as the daughter of the wife of Maharaja Nanda.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
Srila Visvanatha Cakravarti Thakura discusses that Krsna appeared simultaneously as the son of Devaki and as the son of Yasoda, along with the spiritual energy Yoga-maya. As the son of Devaki, He first appeared as Visnu, and because Vasudeva was not in the position of pure affection for Krsna, Vasudeva worshiped his son as Lord Visnu. Yasoda, however, pleased her son Krsna without understanding His Godhood. This is the difference between Krsna as the son of Yasoda and as the son of Devaki. This is explained by Visvanatha Cakravarti on the authority of Hari-vamsa.