It is narrated on the authority of Jabir that he heard the Apostle (may peace and blessings be upon him) saying. Verily between man and between polytheism and unbelief is the negligence of prayer.
سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ إِنَّ بَيْنَ الرَّجُلِ وَبَيْنَ الشِّرْكِ وَالْكُفْرِ تَرْكَ الصَّلاَةِ