Some ayats and hadiths on the importance of prayer.
Attend constantly to prayers and to the middle prayer and stand up truly obedient to Allah. [2:248]
The Shaitan only desires to cause enmity and hatred to spring in your midst by means of intoxicants and games of chance, and to keep you off from the remembrance of Allah and from prayer. Will you then desist? [5:91]
And keep up prayer in the two parts of the day and in the first hours of the night; surely good deeds take away evil deeds this is a reminder to the mindful. [11:114]
But there came after them an evil generation, who neglected prayers and followed and sensual desires, so they win meet perdition, [19:59]
Men whom neither merchandise nor selling diverts from the remembrance of Allah and the keeping up of prayer and the giving of poor-rate; they fear a day in which the hearts and eyes shall turn about; [24:37]
Recite that which has been revealed to you of the Book and keep up prayer; surely prayer keeps (one) away from indecency and evil, and certainly the remembrance of Allah is the greatest, and Allah knows what you do. [29:45]
Turning to Him, and be careful of (your duty to) Him and keep up prayer and be not of the polytheists [30:31]
In gardens, they shall ask each other about the guilty: What has brought you into hell? They shall say: We were not of those who prayed; And we used not to feed the poor; And we used to enter into vain discourse with those who entered into vain discourses. And we used to call the day of judgment a lie; Till death overtook us. So the intercession of intercessors shall not avail them. [74:40-48]
And they were not enjoined anything except that they should serve Allah, being sincere to Him in obedience, upright, and keep up prayer and pay the poor-rate, and that is the right religion. [98:5]
1 - Muhammad b. Yaqub al-Kulayni - the author of this book (may Allah have mercy on him) said: (narrated to me) Muhammad b. Yahya from Ahmad b. Muhammad b. `Isa from Hasan b. Mahbub from Mu`awiya b. Wahb who said: I asked Aba `Abdillah Úáíå ÇáÓáÇã about the best of actions with which the slaves can attain closeness to their Lord, and the (action) which is the most beloved to Allah ÚÒæÌá - what is that? So he said: I do not know of a thing after the cognizance (ma’rifah) better than these prayers (five daily), do you not see that the pious slave - `Isa b. Maryam (Úáíå ÇáÓáÇã) said: “And He has ordained upon me the prayer and the purification as long as I live” (19:32). (Sahih)
1 - `Ali b. Ibrahim from Muhammad b. `Isa from Yunus b. Abdir-Rahman from Abdir-Rahman b. al-Hajjaj from Aban b. Taghlub who said: I was praying behind Abi `Abdillah Úáíå ÇáÓáÇã in Muzd`Alifah, so when he finished it (leading the prayer) he turned towards me and said: O Aban, the obligatory prayers are five, whoever abides by their limits (fulfills the conditions attached to them) and safeguards their timings, meets Allah on the day of judgement while having with Him a promise by which He (i.e. Allah) enters him into Jannah, and whoever does not abide by their limits and does not safeguard their timings meets Allah and he has no promise with Allah, if He so wishes he punishes him and if He so wishes forgives him. (Sahih)
6 - `Ali b. Ibrahim from his father (Ibrahim b. Hashim) from Ibn Abi `Umayr from `Umar b. Udhayna from Zurara (b. A’yan) from Abi Ja`far Úáíå ÇáÓáÇã who said: While the Messenger of Allah Õáì Çááå Úáíå æÂáå was sitting in the Masjid one day, a man came and stood to pray, so he (i.e. the man) did not give attention to his Ruku nor Sujud (in his haste), so he Õáì Çááå Úáíå æÂáå said: He pecks like the pecking of the crow (up and down – raising and falling rapidly) but if he were to die now and this is the state of his prayer he would have died on a religion other than mine (i.e. what is not my religion – foreign to me). (Hasan due to Ibrahim)
7 - `Ali b. Ibrahim from his father (Ibrahim b. Hashim) from Hammad (b. `Isa) from Hariz (b. Abdallah) from Zurara (b. A’yan) from Abi Ja`far Úáíå ÇáÓáÇã who said: Do not neglect (take casually) the prayer, for verily the Prophet Õáì Çááå Úáíå æÂáå had said while he was about to die: He is not from me who takes his prayers lightly, nor is he from me who drinks the intoxicants, he is not going to be returned to me at the pond, no by Allah (he is not). (Hasan due to Ibrahim)
10 - Muhammad b. Yahya from Ahmad b. Muhammad from `Ali b. Hakam from Hisham b. Salim from Abi `Abdillah Úáíå ÇáÓáÇã who said: When a slave stands to pray but takes it lightly, Allah ÊÈÇÑß æÊÚÇáì says to his angels: Do you not see My slave, it is as though he thinks that the fulfillment of his desires are in the hands (or under the mercy) of another, does he not know that the fulfillment of his desires are in My hands (under my mercy). (Sahih)
6 – And from Muhammad b. Yahya from Ahmad b. Muhammad from Ibn Faddal from Ibn Bukayr from `Ubayd b. Zurara. He said: I asked Abu `Abdillah ( Úáíå ÇáÓáÇã ) about the saying of Allah `azza wa jalla “And whoso disbelieves in the faith, of a truth his work is vain” (5:5). So he said: Abandonment* of the act which one confirms thereby. From it is the one who leaves off salat on purpose, not from intoxication and not from a reason.
7 – And from al-Husayn b. Muhammad from Mu`alla b. Muhammad from al-Hasan b. `Ali from Hammad b. `Uthman from `Ubayd from Zurara from Abu `Abdillah ( Úáíå ÇáÓáÇã ) its like, except that he said: From that is that he abandons salat from other than illness and not busyness.
4 – And from `Ali b. Ibrahim from his father from Ibn Abi `Umayr from `Abd ar-Rahman al-Hajjaj from `Ubayd b. Zurara from Abu `Abdillah Úáíå ÇáÓáÇã in the hadith of the greater sins. He said: Verily the abandoner of salat is a kafir – meaning not due to an illness (or, reason).
6 – Ahmad b. Muhammad al-Barqi in al-Mahasin from Muhammad b. `Ali from Ibn Mahbub from Jamil b. Salih from Burayd b. Mu`awiya al-`Ijli from Abu Ja`far Úáíå ÇáÓáÇã. He said: The Messenger of Allah Õáì Çááå Úáíå æÂáå said: There is not between the Muslim and that he become a kafir (or, commit kufr) but the abandonment of the obligatory salat, on purpose or disregarding it and thus not praying it.
Abubasir said that he visited Umm Hamidah (Musa-ibn Ja'far's [a] mother) in order to console her for the death of Ja'far-ibn-Muhammad [a]. Then she wept and he wept because of her weeping. After that, she said: "O' Aba Muhammad! If you had seen Ja'far-ibn-Muhammad when he was on his death-bed, you would have observed a wonderful thing: he opened his eyes and said to gather all of his relatives." Then, she continued saying that they gathered them all with no exception. Then he [a] looked at them and said: "Verily, our intercession does not reach the one who takes prayers lightly".
Wasa'il-ush-Shi'ah vol. 4, p. 26
Imam Baqir [a] said: "On the Reckoning Day, the first thing that a servant will be reckoned for is the prayer; therefore, if it is accepted, the rest (good actions) will be accepted, too, (otherwise, his other good deeds will not avail him)."
Bihar-ul-Anwar, vol. 7, p. 267
The Holy Prophet [s]said: "The one who takes prayer light is not of me. No, by Allah such a person will not reach the Haud, Pond of abundant."
Man La Yahduruhul Faqih, vol. 1, p. 206