The Ruling On Splitting Into Groups and Parties
A lecture built around the question, ‘What is the Sharīʿah ruling on these numerous Islamic groups, sects and organisations as they are different from each other in their methodologies, styles, calls and beliefs, the very foundations that they are established upon in regards to the ḥadīth that proves that the group that adheres to the truth is only a single group?’
A magnanimous answer delivered over the course of an hour by the mountain of knowledge in his time, al-Imām, Muḥammad Nāṣir al-Dīn al-Albānī (raḥimahullāh).
From ’Awf Ibn Mālik (raḍī Allāhu ʿʿʿanhu) who said that the Messenger of Allāh (ṣallallāhu ʿalayhi wa-sallam) said: ‘‘The Jews will split into seventy-one sects, so one will be in Paradise and seventy will be in the Fire. And the Christians will split into seventy-two sects, so seventy-one will be in the Fire, and one will be in Paradise. Any by the One in whose Hand the soul of Muḥammad is, my Ummah shall split into seventy-three sects, and one will be in Paradise and seventy-two will be in the Fire.’’ It was said: ‘Who are they O Messenger of Allāh?’ He said: ‘‘The Jamāʿah.’’ 
Allāh the Blessed, the Most High - said:
"And hold fast altogether to the rope of Allāh and do not be divided. And remember the favour of Allāh upon you, in that you were once enemies to one another, but He joined your hearts together, so that by His Grace you became brothers.” [Sūrah Āl ʿImrān, 3:103]
 Ḥasan: Related by Ibn Mājah (no. 3992)