I am confused if istinja is part of wudu because one has to perform wudu before performing salah but does this mean they have to perform istinja too?
When I search online on how to do wudu, look in some books or even Islamic shows on the TV that show how to do wudu, they do not include istinja as a step. Also at college when people pray they do not perform istinja, but does that mean their salah is invalid as they are not in a complete state of purity?
1) Is istinja part of wudu
2) Does one have to perform istinja before salah?
Please include where you got the information from e.g. quote hadith.
(According to Sunni Hanafi Madhab)