Inna allatheena farraqoo deenahum wakanoo shiyaAAan lasta minhum fee shay-in innama amruhum (surah Anam: 159)

Tafseer Tafheem-ul-Quran by Syed Abu-al-A'la Maududi

(6:159) Surely you have nothing to do with those who have made divisions in their religion and become factions. *141 Their matter is with Allah and He will indeed tell them (in time) what they have been doing.

Innal lazeena farraqoo deenahum wa kaanoo shiya`allasta minhum fee shai`; innamaaa amruhum ilallaahi summma yunabbi`uhum bimaa kaanoo yaf`aloon

*141). This is addressed to the Prophet (peace be on him) and through him to all followers of the true faith. The import of this statement is that true faith has always consisted, and still consists, in recognizing the One True God as one's God and Lord; in associating none with God in His divinity - neither in respect of His essence, nor of His attributes, nor of His claims upon His creatures; in believing in the Hereafter and hence considering oneself answerable before God; and in living according to those principles and values which have been communicated by God to mankind through His Prophets and Books. This was the religion entrusted to man at the beginning of human life. The religions which emerged later stemmed from the perverted ingenuity of man, from his baser lusts, and from an exaggerated sense of devotion to venerable personalities. Such factors corrupted the original religion and overlaid it with harmful innovations. Hence, people modified and distorted the original beliefs by mixing them with products of their conjecture and philosophical thinking. More and more innovations were added to the original laws of the true religion. Putting aside the Law of God, men set themselves up as their own law-makers, indulged in hair-splitting elaborations, and exaggerated the importance of disagreements in minor legal problems. They showed excessive veneration for some Prophets of God and some standard-bearers of the true religion, and directed their rancour and hatred against the others. Thus there emerged innumerable religions and sects, the birth of each leading to the fragmentation of humanity into an ever-increasing number of mutually hostile groups. Anyone who decides to follow the true religion must therefore cut himself off from all factions and chart an independent course.