The word(s) "congregational" appears 8 time(s) in 8 verse(s) in Quran in Mohsin Khan translation.

(1) When you have finished As-Salat (the congregational prayer), 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, As-Salat (the prayer) is enjoined on the believers at fixed hours.

(2) 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).

(3) So bear patiently (O Muhammad صلى الله عليه وسلم) what they say, and glorify the praises of your Lord before the rising of the sun, and before its setting, and during some hours of the night, and at the ends of the day (an indication for the five compulsory congregational prayers), that you may become pleased (with the reward which Allah shall give you).

(4) Those (Muslim rulers) who, if We give them power in the land, (they) enjoin Iqamat-as-Salat [i.e. to perform the five compulsory congregational Salat (prayers) (the males in mosques)], to pay the Zakat and they enjoin Al-Ma'ruf (i.e. Islamic Monotheism and all that Islam orders one to do), and forbid Al-Munkar (i.e. disbelief, polytheism and all that Islam has forbidden) [i.e. they make the Qur'an as the law of their country in all the spheres of life]. And with Allah rests the end of (all) matters (of creatures).

(5) And those who strictly guard their (five compulsory congregational) Salawat (prayers) (at their fixed stated hours).

(6) And your movements among those who fall prostrate (to Allah in the five compulsory congregational prayers).

(7) And His are all the praises and thanks in the heavens and the earth; and (glorify Him) in the afternoon (i.e. offer 'Asr prayer) and when you come up to the time, when the day begins to decline (i.e. offer Zuhr prayer). (Ibn 'Abbas said: "These are the five compulsory congregational prayers mentioned in the Qur'an)." [Tafsir At-Tabari]

(8) So be patient (O Muhammad صلى الله عليه وسلم). Verily, the Promise of Allah is true, and ask forgiveness for your fault and glorify the praises of your Lord in the 'Ashi (i.e. the time period after the midnoon till sunset) and in the Ibkar (i.e. the time period from early morning or sunrise till before midnoon) [it is said that, that means the five compulsory congregational Salat (prayers) or the 'Asr and Fajr prayers].