As I and several others have pointed out on previous posts, the concept of praying to an omniscient, omnipotent God is self-contradictory.
Whatever is going to happen is predetermined by God, irrespective of whether anyone prays or not. To imagine that your prayers are somehow going to cause God to change his plans contradicts that and is supremely arrogant. Whether you pray or not is also predetermined, so basically, there is no such thing as free will.
Similarly, if God is omnipotent and omniscient, that means he does not have free will either, since he cannot change anything, because he has always known the outcome.
Such basic contradictions seem to be beyond the comprehension of theists, who, by their flawed "reasoning", are actually committing a sin against God by obstinately not using their power of reason or intelligence, which they claim is a gift from God in the first place.