Ruling on one who doubts during prayer that he has broken his ritual purity

Your Eminence the Shaykh, may Allah preserve you: If a man is traveling and the time for the Maghrib prayer enters, and he intends to combine it with the 'Isha' prayer, and he was in a state of ritual impurity before that, then he performed the ablution while on the road. The time entered, and he doubted in the middle of the prayer that he had broken his ritual purity after that. Then he did not pay attention to it and completed the prayer. After he arrived in his city, he had some concern in his heart about this prayer, so he repeated it and shortened it?

First: You must know that if a person doubts whether he has broken his ritual purity or not, he should not pay attention to this matter and should ignore it; because this matter was reported to the Prophet (peace and blessings be upon him) that a person feels something in his belly and thinks that something has come out of him, so he said: (Do not leave the prayer until you hear a sound or find a gas) and thank Allah for your well-being. Ignore it and pray, and your prayers are valid, and do not doubt them. Yes, if you become certain after this that you have broken your ritual purity and that you prayed without ablution, then perform the ablution and repeat the prayer. In this case, if you repeat it, you repeat it in full as a precaution.