Ibn Jawzi wrote in his tafsir  Elmugni: Abu Bakr-i Siddiq (radiy-Allahu 'anh) said that, when the time of a daily prayer of namaz comes, angels say, 'O the sons of Adam, get up! Extinguish the fire prepared to burn human beings by performing namaz. ' " In a hadith-i sherif, it was said, "The difference between the Believer and the unbeliever is namaz," that is, the Believer performs namaz, and the unbeliever does not. Munafiqs , however, sometimes perform it and sometimes do not. Munafiqs will undergo very bitter torment in Hell. Abdullah ibn Abbas (radiy-Allahu 'anh), the leader of mufessirs , said that he heard Rasulullah say, "Those who do not perform namaz will find Allahu ta'ala wrathful on the Day of rising."
The imams of hadith unanimously said, "A person who does not perform a namaz in its correct time intentionally, that is, if he is not sorry for not performing a namaz while its correct time is ending, will become a kafir (disbeliever) or will lose his iman during his death. What will become of those who do not remember namaz or see namaz as a duty?" The Ahl as-Sunnat  savants unanimously said, "Ibadat (worship) are not a part of iman." But there was not a unanimity concerning namaz.
 namaz: prayer that is performed five times per day in Islam.
 iman: faith, belief, beliefs of Islam; kalam, i’tiqad.
 fard ‘ain: fard for every Muslim; obligation for every Muslim.
 mi’raj: i) the Prophet’s ascension from Jerusalem to heaven. ii) Prophet’s Ascension from Jerusalem to the skies.
 tafsir: (book, science, of) interpretation of the Qur’an al karim.
 munafiq: one in the disguise of a Muslim but disbelieves Islam, but believing in another religion; a hypocrite.
 mufassir: expert scholar of tafsir.
 Ahl as-Sunna (wa’l-Jama’a): the true pious Muslims who follow as-Sahabat al-kiram. These are called Sunni Muslims. A Sunni Muslim adapts himself to one of the four Madhhabs. These madhhabs are Hanafi, Maliki, Shafi’i and Hanbali.