Wudu’ is broken if a person has gone into sound sleep losing awareness. So, if anyone did sleep soundly and yet woke up and prayed without renewing his or her ablutions, that prayer is not valid. And they ought to repeat the Prayer.

 

However, it is not up to anyone else to judge others, for each person is responsible for his actions; we can only advise them; it is also probable that they were ignorant of the rules of ablution.

 

Having said this I should also point out: According to some scholars such as Ibn Taymiyyah, a person who cannot come out of Haram because of the crowd, is allowed to perform tayammum and pray.