He carried his infant son and then found moisture on his garment, but he did not know whether it was urine or water. What is the ruling on his prayer?

Question:
Honorable Shaykh, may Allah grant you success. The questioner says: I carried my son on my shoulder, and he is one year old. Then I noticed that there was moisture on his clothes that had transferred to my clothes. So I went to pray. Do I have to repeat my prayer, knowing that I do not know whether this moisture is water or urine? May Allah protect you.

Answer:
If you do not know that it is urine, and you are not certain that it is urine, then you do not repeat the prayer. However, if you know that it is urine, you repeat the prayer because you prayed while wearing clothes that were impure. Yes, if you are certain that it is urine, you repeat the prayer because it is forbidden. You prayed in impure clothes. Mere doubt does not invalidate the prayer. Yes.