In the following AHADITH prothet has warned ummat against the division and group making in ummat.
DISAGREEMENT LEAD TO DISCORD IN HEARTS (those disagreement that are not rahmat)The Prophet warned his Companions about the dangers of disagreement. He realized that the survival of the Ummah depended on the harmony and mutual affection of the believers, whose hearts had come together on the basis of love for God. He also realized that the ruin of the Ummah lay in the hearts of believers torn by mutual strife. So the Prophet, peace and blessings of God be on him, repeatedly warned that discord should cease to raise its head and therefore said: "Do not engage in disagreement thereby causing discord among your hearts." [ Al Bukhaaree in al Jaamee` al Sagheer, 2/494.]
IBNE MASOOD
The Companions of the Prophet themselves saw that discord produced nothing good. Ibn Mas`ood, may God be pleased with him, once said: "Disagreement is evil." Furthermore, the Prophet would always nip any disagreement in the bud
WARNING AGAIST DISAGREEMENT ABOUT SCRIPTURE (OTHER THAN THE SCHOLARY BETWEEN ULMAE HAQ,THAT WILL ALWAYS WITHIN LIMIT OF RAHMAT)
`Abd Allaah ibn `Umar shows. He said:
One day I called upon the Messenger of God, may God bless him and grant him peace, during the midday rest. [While I was there], the Prophet heard two men arguing loudly in disagreement over [the meaning of a Qur'anic verse]. The Messenger of God, may God bless him and grant him peace, went out with anger showing on his face and said: `People before you perished only because of their disagreement about the Scripture.' [ Ibn Hazm, al Ihkaam, 5/66.]
