I've seen some say 7 years,10 years,puberty and so on. When does one have to pray, fast, do Hajj etc and is it valid if you done it before the age?

Please provide Hadith and Quranic evidence if possible.

  • Your question about validity of Hajj is covered here: Do I need to do Hajj again if I performed it as a child? Note that children should be trained for religious obligations during childhood, especially about prayer there is a hadith that they should be taught to pray at seven and punished for not praying at ten. – UmH Feb 24 '19 at 17:22