Was Jesus, peace be upon him, sent as a prophet when he was thirty years old or in the cradle, and what is the evidence for that?

Scholars have differed regarding when Jesus, peace be upon him, was sent as a prophet. Some believe that revelation came to him as a prophet when he was a mature man, thirty years old, and that his speaking in the cradle was to affirm his mother's innocence and was a precursor to his prophethood. Others believe that he was sent as a prophet from birth, and that his speaking in the cradle was an introduction to his prophethood, while his maturity was for inviting people to Allah's law.

It is advisable not to preoccupy oneself with such issues that yield no great benefit, and instead to focus on beneficial religious knowledge.