CC Ādi 14.21
nānā camatkāra tathā karāila darśana
After some days the Lord began to crawl on His knees, and He caused various wonderful things to be seen.
The Caitanya-bhāgavata describes that one day while the Lord was crawling upon His knees, the bells on His waist ringing very sweetly, a snake came out to crawl in the yard of the Lord, who captured the snake like a curious child. Immediately the snake coiled over Him. The Lord as a child then rested on the snake, and after some time the snake went away, leaving the Lord aside.