and do not allot anyone a share in it.
Al-Fuḍayl ibn ʿIyāḍ (d. 187 AH) said about the Almighty’s words, “that He may test you to see which of you is best in deed” (Q 67:2): “The best deed is the one that is most sincere and most correct.” He was asked, “Abū ʿAlī, what does ‘most sincere and most correct’ mean?” He replied, “If a deed is sincere but not correct, it will not be accepted; and if it is correct but not sincere, it will not be accepted—until it is both sincere and correct. Sincerity means that it is done for Allah alone, while correctness means that it accords with the Sunnah.”
For this reason Allah censured the polytheists in the Quran for adopting the religious regulations invented by their supposed partners—worshipping others beside Him and performing acts of religion that He had never legislated. Allah, Exalted is He, says, “Or do they have partners who have prescribed for them a religion that Allah has never authorized?” (Q 42:21). Likewise, He reproached them for declaring unlawful what He had not