PURPORT

As stated in one prayer,

srutim apare smrtim itare
bharatam anye bhajantu bhava-bhitah
aham iha nandam vande
yasyalinde param brahma

"Let others study the Vedas, smrti and Mahabharata, fearing material existence, but I shall worship Nanda Maharaja, in whose courtyard is crawling the Supreme Brahman. Nanda Maharaja is so great that the Para-brahman is crawling in his yard, and therefore I shall worship him." (Padyavali 126)

Brahma was falling down in ecstasy. Because of the presence of the Supreme Personality of Godhead, who exactly resembled a human child, Brahma was naturally astonished. Therefore with a faltering voice he offered prayers, understanding that here was the Supreme Person.