'In the name of Allah, the most beneficent & the most merciful'

Allah SWA saying in Holy Quran

Let there be a community among you who call to the good,

and enjoin the right, and forbid the wrong. They are the ones who have success.(Holy Quran, 3:104)

(Surah Younus - 10:58)

O Mankind! There has come to you a good advice from you Lord (i.e. the Qur'an, ordering all that is good and forbidding all that is evil), and a healing for that (disease of ignorance, doubt, hypocrisy and differences, etc.) in your breast, - a guidance and a mercy (explaining lawful and unlawful things, etc.) for the believers. (Surah Younus – 10:58)

From Umar bin al-Khattab (ra), who said that RasulAllah (saw) said: "Indeed Allah (swt) raises the statute of a people by this book (Qur'an) and lowers others by it." (Muslim)