Snippet from Bhagavatam:

One day, playmates complained to Mother Yashoda that little Krishna had eaten mud. Worried, she scolded him and demanded he open his mouth to prove his innocence. Krishna obliged.

As Yashoda peered inside, she was struck with awe. Instead of dirt, she witnessed the infinite cosmos—galaxies, stars, oceans, and mountains swirling within. She saw the entire universe, including herself looking into his mouth.

For a moment, she realized her son was the Supreme Divinity. However, Krishna gently cast his Maya (illusion) upon her again. The cosmic vision faded, and Yashoda returned to being a doting mother, hugging her little boy, the divine revelation forgotten in her love.