In the name of Allah, Most Gracious, Most

In the name of Allah, Most Gracious, Most Merciful.

According Buraydah (may God grant him His satisfaction), the Prophet (peace and salvation be upon him) said: "The only agreement that exists between us and them (the Unbelievers) is the practice of prayer. Whoever abandons it is indeed fallen into disbelief. " (Reported by Attirmidhi)

Jabir (may God grant him His satisfaction) reported: "I heard the Messenger of Allah (peace and salvation be upon him):" Between man on the one hand, and associationism and denial on the other, is the renunciation of the practice of prayer. " (Reported by Moslem)

Riyad as-Salihin (Gardens of the Righteous)

Imam Mohieddine Annawawi 631-676
Translation and Commentary by Dr. Salaheddine Keshrid (Tunisia)
Publisher: Dar Al-Gharb al-Islami
Hadith 1: Chapter 109, Page 339, 1077 Number

Hadith 2: Chapter 109, Page 339, 1076 Number

Source: http://www.ayaatdujour.com/