Where does the idea that faith must be a condition for baptism originate from?

I have been told that I possess a very definitive view of faith in regards to baptism. So far as I believe faith in Jesus as personal Lord and Savior must be present at the time of baptism. Hence my adherence to the doctrine of credo baptism. I would just like to know how you would categorize this view? Is it Lutheran or Calvinistic? What part of Christian theology would comprise such a view? I have started to think critically of my views because for the first time in my life settling down and starting a family is a real possibility and I would like to know how to explain this to a potential mother of my children?