It is reported that Al-Fuḍayl b. ‘Ayyād – Allāh have mercy on him – said: How will you be if you reach a time when you will see people who do not distinguish truth from falsehood, believer from unbeliever, trustworthy from treacherous, nor ignorant from knowledgeable, and neither recognize what is right nor censure what […]
It is reported that Ibn Mas’ūd – Allāh be pleased with him – said, “Whoever wants to honor his religion and do good to it should avoid mixing with the ruler or sitting with the followers of desires (heretics, people of bid’ah), for sitting with them is more contagious than scabies.” Ibn Waddāḥ, Al-Bida’ p136.
ʿAbdullāh b. Mas’ūd – Allāh be pleased with him – said: Women are but an ‘awrah (something private to be covered). A woman might leave her house without there being any problem with her, but the Shaytān seeks her out and says [to her], “You will not pass by anyone except that you will impress/please […]
O People of Scripture! Do not be extreme in your religion! [Al-Mâ`idah (5): 77] It is reported from Qatâdah – Allâh have mercy on him – that he said, commenting on this verse, “Meaning: do not innovate in religion and do not sit with a religious innovator (mubtadi’).” Ibn Battah, Al-Ibânah Al-Kubrâ Vol.1 p394.
It is reported from Abû Qilâbah – Allâh have mercy on him – that he said: Do not sit with the People of Desires (Bid’ah), for I fear that they will immerse you in their misguidance or mix up and confuse what you already know. Ibn Battah, Al-Ibânah Al-Kubrâ Vol.1 p377.
The great Companion and scholar Muadh b. Jabal explains one of the main reason for the invention of Bid’ah in religion.