Manga where main character joins two people on an adventure to try and control his power

The main character is either reincarnated or summoned (I can’t remember) and is extremely powerful, but he can’t control his power so it goes off randomly.

He joins two people on an adventure to try and control his power, the party consists of a child and a knight(?).

The whole story is about the shenanigans he gets into because of his power.