It is stated in the book of Tafsir named Baidawi, one of the most valuable books of Tafsir, "Hadrat Abdullah ibni Abbas 'radi- allahu ta'ala anhuma' was asked: In what part of Qur'an al-karim is the ayat al-karima commanding the five daily prayers of namaz? He answered: Read the seventeenth and eighteenth ayats of Rum sura. These two ayat al-karimas purport, "Make tasbih of Allahu ta'ala at evening and morning times. The hamds performed by heavenly and earthly beings and done in the afternoons and at noon times are for Allahu ta'ala." The 'tasbih' to be done 'at evening time' represents the prayers of namaz to be performed in the evening and at night. The tasbih to be done in the morning stands for the namaz be performed in the morning. The 'hamds done in the afternoons and at noon times' symbolize afternoon and noon prayers of namaz. The ayat al-karimas command to perform the namaz five times daily." Those who deny the five daily prayers of namaz become startled when they hear this ayat al-karima. They say that this ayat al-karima does not contain the word 'Salat'. When they are quoted the ayat al-karima commanding to 'make salat' and told that there are more than sixty-five such ayats, they make a U-turn and say that "Salat means prayer. We obey these ayats and pray in seclusion. Namaz is not an Islamic commandment."
The two hundred and thirty-ninth (239th) ayat of Baqara sura purports, "Protect the salats and the salat of wusta! [That is, perform the namaz continuously]. Obey Allah and make salat!" 'Protect the salat' means 'Perform the five daily prayers of namaz at their proper times and observing their conditions.' It is stated in a hadith ash-Sharif, which is written in the book Musnad by Imam-i-Ahmad and in Imam-i-Munawi's book Kunuz-ud-daqaiq: "The salat of wusta is the afternoon namaz." Hadrat Ali 'karram-allahu wajhah' narrated: Our Prophet stated in the combat of Hendek (Trench), "The enemy did not let us perform the wusta [afternoon namaz]. May Allahu ta'ala fill their abdomens and graves with fire!" Salat means both prayer and namaz. Hence the word 'salat' used in this ayat al-karima means the 'namaz' which we know. The ayat al-karima says to perform the prayers of namaz and the afternoon prayer. According to the Arabic grammar, the word 'salats' means 'three salats in the least'. Since the afternoon salat is called (Wusta), which means 'the namaz in the center', the number of salats meant here cannot be only three. There have to be at least four salats in addition to the afternoon so that the afternoon salat be exactly in the center, that is, between the second and the fourth salats. Kamaleddin-i-Shirwani 'rahmatullahi ta'ala alaih' quotes the fifty-ninth ayat al-karima of Nur sura in his book Miftah-us-saada to prove that the number of salats to be performed daily is five. The names of morning and night prayers of namaz are written clearly, i.e. as 'Salat-i-fajr' and 'Salat-i-isha', in the fifty-ninth ayat of Nur sura.
The hundred and second (102nd) ayat of Nisa sura purports, "To perform the namaz at certain times has become fard for Muslims." It is stated in a hadith ash-Sharif, which exists in the books Riyad-un-nashin and Hulasat- ud-dalail: "I was by the entrance to Kaba, when Jabrail 'alaihis-salam' came near me twice. He performed noon prayer with me as the sun left its position at the zenith." In another hadith ash-Sharif, which is written in Abulleys-i-Samarkandi's book Muqaddimat-us-salat existing with number  at the section called (Asad Effendi) in the library of Sulaimaniya and also recorded in the book Fath-h-ul-Qadir at the section named Ayasufia (Saint Sophia), our Prophet 'sall-allahu alaihi wa sallam' states: "Jabrail 'alaihis-salam' made me perform the namaz for two days by the entrance to Kaba. The first day, we performed morning prayer as the fajr-i-Thani [whiteness] appeared, noon prayer as the sun left it zenith, afternoon prayer as shadows were as long as the real objects they represent, evening prayer as the sun set, and night prayer as dusk disappeared. The second day we performed morning prayer at daybreak, noon prayer when everything had a shadow as long as itself, afternoon prayer when the shadow of everything was twice as long as itself, evening prayer at the time of breaking fast, and night prayer when one-third of the night time had elapsed. Then he said: O Muhammad! These are the times of the namaz for thee and for past Prophets and for thine Ummat." As Sulaiman bin Bereeda narrates from his father in the book Muslim, somebody asked Rasulullah about the times of namaz. The Messenger of Allah said, "Perform namaz with me for two days!" As the sun left the zenith, he ordered Bilal Habashi to call the adhan. We performed noon prayer. It is stated in a hadith ash-Sharif, "Afternoon prayer is performed before sunset."