On Fasting Without Prayers
The following was taken from:
"The Fataawa of The Standing Committee for Islaamic Research and ifta (Fataawa al-Lajnat -ud-daaimah lil-buhuth al-Ilmiah wal-iftaa)", Volume 10: Zakaat and Siyaam, Gathered and organized by Shaykh Ahmad bin abdur-Razaaq ad-Duwaish, Dar al- `Aasimah, 1413h."
Question #2 Fatwa # 102
Q) If a person was intent on the fasting of Ramadhaan and prayer in Ramadhaan only, but he leaves prayer right after at the closing of Ramadhaan, then does the fasting count?
A) The prayer is a pillar from the pillars of Islaam, and it is the most important after the two testimonies (shahaadatayn), and it is amongst the individual obligations (fardh al-ayn), and whoever leaves it, arguing its obligation [saying it is not obligatory] or out of weakness or laziness, then indeed he has gone into disbelief. As for those who fast Ramadhaan and pray in Ramadhaan only, their fasting does not count with the fact that they leave prayer outside Ramadhaan, but rather are disbelievers by that and have committed the great kufr, even if they do not argue the obligation of the prayer according to the stronger of the two opinions of the scholars, due to his (Sallallaahu Alayhi Wa Sallam) saying, " The covenent which is between us and them [the disbelievers] is the Prayer, so whoever leaves it, then indeed he has disbelieved." related by Imaam Ahmad, Abu Dawud, Tirmithee, Nisaa`ee, and ibn Maajah with an authentic chain on the authority of Buraydah al-Aslamee (r), and his (Sallallaahu Alayhi Wa Sallam) saying, "The head of the matter is Islaam, its pillar is the prayer, and its highest peak is jihaad in the Way of Allaah," related by Imaam Ahmad and Tirmidhee, may Allah have mercy on them, with an authentic chain on the authority of Mu`aadth ibn Jabal (r) , and his (Sallallaahu Alayhi Wa Sallam) saying, "Between the person and disbelief and shirk (associating partners with Allaah) is the leaving of the prayer," related by Imaam Muslim in his "Saheeh" on the authority of Jaabir ibn Abdullaah Al-Ansaaree (r), and the hadiths with this meaning are many.
And from Allah is tawfeeq, and may the Peace and Blessings of Allaah be on His messenger, his family, and his companions