Purity: Ruling on Discharge After Wuḍūʾ and Istibrāʾ
Practical Laws of Islam as per the teaching of Ayatullah Sistani
Ruling 73
If a man performs istibrāʾ after urinating and then performs wuḍūʾ, in the event that after wuḍūʾ he sees fluid that he knows to be either urine or semen, it is obligatory that as a precaution he perform ghusl as well as wuḍūʾ. However, if he had not performed wuḍūʾ, it is sufficient for him to perform wuḍūʾ only.
-Ayatullah Sistani, Practical Laws of Islam, Purification (Taharah)