Jabir reported God’s Messenger as saying, “What lies between a man and infidelity is the abandonment of prayer.”* *This means that when a man does not make it his practice to observe the prayer he is no longer a Muslim. Muslim transmitted it.
Hadith Referenceمشكوة المصابيح / كتاب الصلاة / 569
Hadith Gradingالألبانی:صَحِيح | زبیر علی زئی:صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «رواه مسلم (134/ 82)»