In doubt after some time whether he said “HaMelech HaKadosh”
Question
Answer
Shalom u’vrachah
Since after the prayer you were not in doubt, and only after an hour did the doubt begin, the prayer is not repeated.
Only someone who is in doubt immediately upon finishing the prayer repeats it.
Source
Mishnah Berurah siman 422, se’if katan 10
However, we have already written above in siman 114, in the Mishnah Berurah se’if katan 38, in the name of the Acharonim, that if it is clear to him that he had in mind to mention the relevant addition for the occasion during the prayer, and after a considerable amount of time a doubt arose in his heart as to whether he mentioned it in the prayer or not, he does not need to repeat it; however, all this applies if the doubt arose after some time but if the doubt arose for him immediately after the prayer, he should repeat it:
