What is the ruling on a man who played with his wife (sexually) during the daytime of Ramadan until he ejaculated, he does not know if this is forbidden or not. What is upon him?

If he played (sexually) with his wife so that he may fulfill his desires by masturbating outside of her vagina then this is considered a sin based on the statement of the Prophet -salalahu alayhi wa salem- in a hadeeth al qudsee:”…he has left his food, drink and desires for Me…”. But if he played with her and he is ignorant of this affair, then upon him is repentance to Allah once knowledge comes to him. But if he plays with her and he has knowledge that this type of playing is permissible and not forbidden and nothing is forbidden except intercourse but he happens to ejaculate without intending to do so, then there is nothing upon him. In any event in all these previously mentioned situations there is no expiation upon him and this is the statement of Abi Muhammad bin Hazm -rahimahullahi ta’ala, and this is what is correct.