Actually he did not. The whole "Jesus is the literal son of god" thing was invented by the churches some hundreds of years after Jeus was dead. In the same wake Jesus never spoke about the trinity, that god would have three aspects. That is also an invention of the churches to make christianity more palateable to polytheist pagans, in the same way that christmas was put next to the winter solstice and easter onto spring where it was mixed with pagan fertility deities, quite literally being named after the Germanic goddess of spring Eostre in Englisch or Ostera in German where easter is called Ostern.

https://en.wikipedia.org/wiki/Son_of_God_(Christianity)

https://en.wikipedia.org/wiki/First_Council_of_Nicaea

https://en.wikipedia.org/wiki/Easter