The Prophet Muhammad (Sal-allahu-alleihi-wasallam) said,
"That which distinguishes us from the disbelievers and hypocrites
is our commitment to Prayer. He who gives it up falls into disbelief."
Narrated by Buraydah ibn al-Hasib (Radi Allah Ta'lah Anhu); Ahmad, Tirmidhi,
Nasai and Ibne Maja transmitted it. Hadith No.574 of Mishkat Al-Masabih.