The ruling on one who prayed and did not know about the discharge of pre-seminal fluid until after the prayer, and whether he must wash the garment if he does not know the location of the impurity?

The questioner:
He says: Honorable Shaykh, may Allah grant you success, if pre-seminal fluid (madhi) is discharged and one does not know the place on the clothing it affected, what should he do? Pre-seminal fluid (madhi) with a dhal is washed if it becomes strong

The Shaykh:
and it becomes a state of ritual impurity, and he does not know from which part of the garment it came, he washes the entire garment.

The questioner:
And what is the ruling on the prayer if he did not feel the pre-seminal fluid (madhi) until after he had completed the prayer?

The Shaykh:
If he did not know about it until after the prayer and does not know whether it came out during the prayer or after the prayer, the prayer is valid, except if he is certain that it came out during the prayer. Yes.