Do you believe that God rewards people who do their prayer and fasting and charity in secret?

I know a family of 4 people that I was close friends with a long time ago, both the father and the daughter in that family had dangerous medical problems with an extremely low probability of survival, and both are thriving now with very healthy bodies, beautiful appearances and amazing careers, and the wife and son in the family are also prospering, the son, might be one of the most intelligent people in the city. One thing about the daughter and father who survived is that they were both private and secretive about their virtue. I was in the daughter's life for 18 years so I know she was heavily interested in charity and good deeds and I also know she was very secretive about it.

Do you believe that God rewards people who do their prayer and fasting and charity in secret?
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