How to add elements, like labels to a BindableLayout

I have a BindableLayout in my ContentPage, everything works just perfect and does what I wanted to. The problem now is that when I tried to add a Label ( <Label Text="Welcome" /> ) outside the BindableLayout doesn't appears in my app, but when I add it inside it, it marks me an error "Content Element appear more than once".... How can I add elements to my page now?