Prayer is the second of the five pillars of Islam, the first being belief in the Unity of God. Prayer is the most potent means of establishing and strengthening one's communion with one's Maker and of drawing near to Him. It is a dynamic phenomenon, God hears and responds to prayer. The Islamic concept of prayer is a direct and uninhibited pouring forth of the soul by the supplicant before the Divine Majesty in certainty of Allah's grace, mercy, and power. In worship there is no need of an intermediary between man and his Maker.
98: 6. And they were not commanded but to serve ALLAH, being sincere to HIM in obedience, and being upright, and to observe Prayer and pay the Zakat. And that is the right religion.
51: 57. And I have not created the jinn and the men but that they may worship ME.
17: 79. 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: 80. And during a part of the night wake up for its recitation - a supererogatory service for thee. It may be that thy Lord will raise thee to an exalted station.
2:239. Watch over prayers, and particularly the middle Prayer, and stand before ALLAH submissively.