Hadith 55
من صلى فى مسجدي أربعين صلاة لا يفوته صلاة كتبت له برائة من النار و نجاة من العذاب و بري من النفاق
"Whoever offers forty prayers in my mosque (i.e., Masjid Nabawi) without missing a single prayer among them, then for him freedom from the Fire and salvation from punishment will be written, and he will be free from hypocrisy."