The word(s) "prayer" appears 130 time(s) in 90 verse(s) in Quran in Mohsin Khan translation.

(31) And this (the Qur'an) is a blessed Book which We have sent down, confirming (the revelations) which came before it, so that you may warn the Mother of Towns (i.e. Makkah) and all those around it. Those who believe in the Hereafter believe in it (the Qur'an), and they are constant in guarding their Salat (prayers).

(32) Say (O Muhammad صلى الله عليه وسلم): "Verily, my Salat (prayer), my sacrifice, my living, and my dying are for Allah, the Lord of the 'Alamin (mankind, jinn and all that exists).

(33) Say (O Muhammad صلى الله عليه وسلم): My Lord has commanded justice and (said) that you should face Him only (i.e. worship none but Allah and face the Qiblah, i.e. the Ka'bah at Makkah during prayers) in every place of worship, in prayers (and not to face other false deities and idols), and invoke Him only making your religion sincere to Him (by not joining in worship any partner with Him and with the intention that you are doing your deeds for Allah's sake only). As He brought you (into being) in the beginning, so shall you be brought into being [on the Day of Resurrection in two groups, one as a blessed one (believers), and the other as a wretched one (disbelievers)].

(34) So, when the Qur'an is recited, listen to it, and be silent that you may receive mercy. [i.e. during the compulsory congregational prayers when the Imam (of a mosque) is leading the prayer (except Surat Al-Fatihah), and also when he is delivering the Friday-prayer Khutbah]. (Tafsir At-Tabari).

(35) Their Salat (prayer) at the House (of Allah, i.e. the Ka'bah at Makkah) was nothing but whistling and clapping of hands. Therefore taste the punishment because you used to disbelieve.

(36) And nothing prevents their contributions from being accepted from them except that they disbelieved in Allah and in His Messenger (Muhammad صلى الله عليه وسلم), and that they came not to As-Salat (the prayer) except in a lazy state, and that they offer not contributions but unwillingly.

(37) And never (O Muhammad صلى الله عليه وسلم) pray (funeral prayer) for any of them (hypocrites) who dies, nor stand at his grave. Certainly they disbelieved in Allah and His Messenger, and died while they were Fasiqun (rebellious, - disobedient to Allah and His Messenger صلى الله عليه وسلم).

(38) (The believers whose lives Allah has purchased are) those who turn to Allah in repentance (from polytheism and hypocrisy, etc.), who worship (Him), who praise (Him), who fast (or go out in Allah's Cause), who bow down (in prayer), who prostrate themselves (in prayer), who enjoin (on people) Al-Ma'ruf (i.e. Islamic Monotheism and all what Islam has ordained) and forbid (people) from Al-Munkar (i.e. disbelief, polytheism of all kinds and all that Islam has forbidden), and who observe the limits set by Allah (do all that Allah has ordained and abstain from all kinds of sins and evil deeds which Allah has forbidden). And give glad tidings to the believers.

(39) They said: "O Shu'aib! Does your Salat (prayer) command that we give up what our fathers used to worship, or that we give up doing what we like with our property? Verily, you are the forbearer, right-minded!" (They said this sarcastically).

(40) And perform As-Salat (Iqamat-as-Salat ), at the two ends of the day and in some hours of the night [i.e. the five compulsory Salat (prayers)]. Verily, the good deeds remove the evil deeds (i.e. small sins). That is a reminder (an advice) for the mindful (those who accept advice).