Volume 3, Book 44, Number 673:
Narrated An-Nu’man bin Bashir (radiallaahu `anhu):
The Prophet (sallallaahu `alayhi wasallam) said, “The example of the person abiding by Allah’s order and restrictions in comparison to those who violate them is like the example of those persons who drew lots for their seats in a boat. Some of them got seats in the upper part, and the others in the lower. When the latter needed water, they had to go up to bring water (and that troubled the others), so they said, ‘Let us make a hole in our share of the ship (and get water) saving those who are above us from troubling them. So, if the people in the upper part left the others do what they had suggested, all the people of the ship would be destroyed, but if they prevented them, both parties would be safe.”
This is the result of not fulfilling Allah’s command:
“Let there arise out of you a group of people inviting to all that is good (Islam), enjoining Al-Ma‘roof (i.e. Islamic Monotheism and all that Islam orders one to do) and forbidding Al-Munkar (polytheism and disbelief and all that Islam has forbidden). And it is they who are the successful” [Aal ‘Imraan 3:104]
If the people on upper level don’t do anything to stop those on the lower level from digging a hole, they’ll all drown, equally guilty.
Enjoining what is good (al-ma’roof) and forbidding what is evil (al-munkar) is one of the most important Islamic duties, indeed it is the noblest and most sublime. This is the task of the Prophets and Messengers (peace be upon them all), as Allaah says (interpretation of the meaning):
“Messengers as bearers of good news as well as of warning in order that mankind should have no plea against Allaah after the (coming of) Messengers” [al-Nisaa’ 4:165]
Allaah has made the Muslim ummah the best nation ever raised up for mankind, in order to do this important task, as Allaah says (interpretation of the meaning):
“You (true believers in Islamic Monotheism, and real followers of Prophet Muhammad and his Sunnah) are the best of peoples ever raised up for mankind; you enjoin Al-Ma‘roof (i.e. Islamic Monotheism and all that Islam has ordained) and forbid Al-Munkar (polytheism, disbelief and all that Islam has forbidden), and you believe in Allaah” [Aal ‘Imraan 3:110]
If the ummah fails to do its duty of enjoining what is good and forbidding what is evil, wrongdoing and corruption will spread throughout the ummah, and it will deserve the curse of Allaah. For Allaah cursed those among the Children of Israel who disbelieved because they failed in this important duty. Allaah says (interpretation of the meaning):
“Those among the Children of Israel who disbelieved were cursed by the tongue of Dawood (David) and ‘Eesa (Jesus), son of Maryam (Mary). That was because they disobeyed (Allaah and the Messengers) and were ever transgressing beyond bounds.
They used not to forbid one another from Al-Munkar (wrong, evildoing, sins, polytheism, disbelief) which they committed. Vile indeed was what they used to do [al-Maa’idah 5:78]