Assalaamu`Alaaykum
Actually to my knowledge of the noble Quraan, prayer is prescribed in the Quraan meaning we should as believers follow the teachings of the Quraan.
Allaah SWT the all mighty commands the believers to perform the Salaah in his noble ketaab, for those who reject salaah reject the command of their lord also!
If you see Surah 2 ayah 2-3 Allaah says : "This is the Book (the Quran), whereof there is no doubt, a guidance to those who are Al-Muttaqun [the pious and righteous persons who fear Allah much (abstain from all kinds of sins and evil deeds which He has forbidden) and love Allah much (perform all kinds of good deeds which He has ordained)].Who believe in the Ghaib and perform As-Salat (Iqamat-as-Salat), and spend out of what we have provided for them [i.e. give Zakat , spend on themselves, their parents, their children, their wives, etc., and also give charity to the poor and also in Allah's Cause - Jihad, etc.]."
Also Surah An Nissa ayah 103 : "When you have finished As-Salat (the prayer - congregational), remember Allah standing, sitting down, and lying down on your sides, but when you are free from danger, perform As-Salat (Iqamat as Salat). Verily, the prayer is enjoined on the believers at fixed hours."
Allaah SWT informs the believers that salaah protects us from the bad i.e Whispers of Shaaytaan
""Shaytaan desires only to excite enmity and hatred between you with intoxicants and gambling, and hinder you from the remembrance of Allah, and from Salah. So will you then not abstain
(from these evils)?" (5:91)"
And when We made the House (Kaaba) a place of return, a sanctuary for
mankind: They took the place where Ibrahim stood (to pray) as a place of prayer
(Musallah, a place of Salaat). We contracted with Ibrahim and Isma‗il: ‗Purify My
House for those who circle it, and those who stay there, and those who bow and who
prostrate.‘ (Qur‘an, 2:125)
Previous Nations who were destroyed because they left As salaah!
"Then, there came after them a generation who gave up Salah and followed lusts; so they will be thrown in Hell." (19: 59)"
These are just a few verses from the Quraan.
Peace