As per the legend, Lord Krishna as an infant was crawling on the ground and mother Yashoda suspected that He had eaten "mitti" (clay). A concerned Yashoda asked Him again and again to open His mouth. When Krishna finally opened His mouth, Yashoda could see therein the entire universe with its vast expanse, with complete opulence of creation, all living entities, all activities eternal time, material nature, spiritual nature, consciousness and different forms of the whole creation. Upon this divine sight, Mother Yashoda fainted.
Lord Krishna again expanded His internal energy just to bewilder her with maternal affection. Immediately mother Yashoda forgot all the philosophical speculations and accepted Krishna as her own child. So mother Yashoda considered, loved and treated Him just as her son instead of revering Him as God even after that incident.