The ruling on praying in a garment that has been soiled by semen, pre-seminal fluid, or a thick fluid passed after urination

Question:
May Allah reward you, Honorable Shaykh. The questioner says: If something of semen, pre-seminal fluid, or a thick fluid passed after urination falls on a garment, is it permissible to pray in that garment?

Answer:
A thick fluid passed after urination is ritually impure, just like urine. As for semen, it is permissible to pray in it, but it is recommended to wash it or rub it if it is dry; it is recommended. Even if he prays in it, his prayer is valid, because semen is pure.