I saw a Majlis in which the martyrdom of Hazrat Muslim ibn Aqeel (as) was discussed I had a question that Hazrat Muslim ibn Aqeel asked for drinking water but was unable to drink as the blood fell in the bowl but how did Hazrat Muslim ibn Aqeel did wudhu as he asked to pray 2 rakat namaz

He was not able to drink because they struck him on his mouth and his lips were bleeding. So when he would drink the bucket would become Najes, and he did not want to ingest water that was Najes.

As for wudhu, he was able to do a Wudhu quickly, and even if we assume the blood was flowing constantly, that was his only way of doing wudhu so it’s valid