Page 67 - The Basic Concepts in the Qur’an

There are explicit commands on brotherhood and unity among believers:
Do not be like those who are divided amongst themselves and opposed to one
another after receiving clear signs: for them there will be a dreadful penalty.
(Al-Imran, 105)

They ask you about the spoils of war. Say: “(Such) spoils are at the disposal of Allah
and the Messenger: So fear Allah, and end your disputes. Obey Allah and His
Messenger, if you are true believers.”
(Al-Anfal, 1)

Have nothing to do with those who have divided their religion up into sects. Allah
will call them to account: He will in the end tell them the truth of all that they did.
(Al-Anaam, 159)

Believers are obliged to be merciful and compassionate towards each other. Modesty is the
distinctive attribute of a believer. Arrogance and envy are not characteristic of believers, but
unbelievers. Thus believers should avoid being seized by this evil side of their souls and should
constantly ask the protection of Allah, repent, and make amends. The end that awaits those
who do not curb the evil of the soul is described in the following verse:
O you who believe! if any from among you turn back from the faith, Allah will soon
replace them by other people whom He will love as they will love Him, who are
humble with the believers, stern towards unbelievers, fighting for Allah’s cause and
never afraid of the reproaches of such as find fault. That is the grace of Allah, which
He will bestow on whom He pleases. Allah encompasses all, and He knows all
things.
(Al-Maeda, 54)