Bid'ah vs Sunnah

And there are people who innovate in the Deen and say it is "good"

{So what is left after the truth except misguidance?} [Surah Yunus (10): 32]

Allaah تعالى said:

﴿الْيَوْمَ أَكْمَلْتُ لَكُمْ دِينَكُمْ وَأَتْمَمْتُ عَلَيْكُمْ نِعْمَتِي وَرَضِيتُ لَكُمُ الْإِسْلَامَ دِينًا﴾

{This day, I have perfected your religion for you, completed My Favour upon you, and have chosen for you Islam as your religion} [Surah al-Maa’idah (5): 3]

﴿وَلَقَدْ صَرَّفْنَا لِلنَّاسِ فِي هَـٰذَا الْقُرْآنِ مِن كُلِّ مَثَلٍ فَأَبَىٰ أَكْثَرُ النَّاسِ إِلَّا كُفُورًا﴾

{And We have explained (for the benefit) of man, in this Qur'an, every kind of similitude: yet the greater part of men refuse (to receive it) except with disbelief (and ingratitude)!} [Surah al-Israa’ (17): 89]

And He تعالى also said:

﴿وَلَقَدْ صَرَّفْنَا فِي هَـٰذَا الْقُرْآنِ لِلنَّاسِ مِن كُلِّ مَثَلٍ ۚ وَكَانَ الْإِنسَانُ أَكْثَرَ شَيْءٍ جَدَلًا﴾

{We have explained in detail in this Qur’aan, for the (benefit of) mankind, every kind of similitude: but man is, in most things, quarrelsome} [Surah al-Kahf (18): 54]

Abu Dharr رضي الله عنه said: The Prophet صلى الله عليه وسلم left us (in such a state) that there was not a bird flapping it wings in the air except that he صلى الله عليه وسلم would teach us about it. He (Abu Dharr) said: the Prophet صلى الله عليه وسلم said: “THERE IS NOTHING LEFT WHICH WOULD TAKE YOU CLOSER TO THE JANNAH AND DISTANCE YOU FROM THE FIRE, EXCEPT THAT IT HAS BEEN MADE CLEAR TO YOU.” [al-Tabaraanee in Mu`jam al-Kabeer (1647) and graded as “Saheeh” by Shaikh al-Albaanee in al-Saheehah (1803)]

Al-`Irbaadh bin Saariyah رضي الله عنه say: The Messenger of Allaah صلى الله عليع وسلم delivered a moving speech to us which made our eyes flow with tears and made our hearts melt. We said: 'O Messenger of Allaah صلى الله عليع وسلم! This is a speech of farewell. What did you enjoin upon us?'

He صلى الله عليع وسلم said: “I AM LEAVING YOU UPON A BRIGHT (PATH) WHOSE NIGHT IS LIKE ITS DAY. NO ONE WILL DEVIATE FROM IT AFTER I AM GONE BUT ONE WHO IS DOOMED.

Whoever among you lives will see great conflict. I urge you to adhere to what you know of my Sunnah and the path of the Rightly-Guided Caliphs, and cling stubbornly to it. And you must obey, even if (your leader is) an Abyssinian leader. For the true believer is like a camel with a ring in its nose; wherever it is driven, it complies.”

[Sunan Ibn Maajah (43) and graded as “Saheeh” by Shaikh al-Albaanee and Shaikh Shu`aib al-Arna’oot]