The Noon Prayer
'Observe Prayer from the declining and paling of the sun till the darkness of the night, and recite the Qur'an at dawn. Verily, the recitation of the Qur'an at dawn is specially acceptable to ALLAH.'
[17:78]
The Afternoon Prayer
"Watch over prayers, and particularly the middle Prayer, and stand before ALLAH submissively."
[2:238]
The Sunset Prayer and The Night Prayer
"And observe Prayer at the two ends of the day, and in some hours of the night. Surely, good works drive away evil ones. This is a reminder for those who would remember. "
[11:114]
SHADADA (DECLERATION OF FAITH) [1]
"[1] God bears witness that there is no god but HE - and also do the angels and those possessed of knowledge, maintaining justice; [1] there is no God but HE, the Mighty, the Wise. "
[3:18]
FASTING
"The prescribed fasting is for a fixed number of days, but whose among you is sick or on a journey, shall fast the same number of other days; and for those who are able to fast only with great difficulty, is an expiation - the feeding of a poor man. And whoso does good of his own accord it is better for him. And fasting is good for you, if you only knew. Ramadan is the month during which the Quran was revealed, providing guidance for the people, clear teachings, and the statute book. Those of you who witness this month shall fast therein. Those who are ill or traveling may substitute the same number of other days. GOD wishes for you convenience, not hardship, that you may fulfill your obligations, and to glorify GOD for guiding you, and to express your appreciation."
[2:184-185]
HAJJ
"You shall observe the complete rites of Hajj and`Umrah for GOD. If you are prevented, you shall send an offering, and do not resume cutting your hair until your offering has reached its destination. If you are ill, or suffering a head injury (and you must cut your hair), you shall expiate by fasting, or giving to charity, or some other form of worship. During the normal Hajj, if you break the state of Ihraam (sanctity) between `Umrah and Hajj, you shall expiate by offering an animal sacrifice. If you cannot afford it, you shall fast three days during Hajj and seven when you return home - this completes ten - provided you do not live at the Sacred Masjid. You shall observe GOD, and know that GOD is strict in enforcing retribution."
[2:196]
ZAKAT (Obligatory Charity)
"The only people to frequent GOD's masjids are those who believe in GOD and the Last Day, and observe the Salat, and give the obligatory charity (Zakat), and do not fear except GOD. These will surely be among the guided ones."
[9:18]
"The believing men and women are allies of one another. They advocate righteousness and forbid evil, they observe the Salat and and give the obligatory charity (Zakat), and they obey GOD and His messenger. These will be showered by GOD's mercy. GOD is Almighty, Most Wise."
[9:71]