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.

وَعَنْ جَابِرٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «بَيْنَ الْعَبْدِ وَبَيْنَ الْكُفْرِ ترك الصَّلَاة» . رَوَاهُ مُسلم