Hadith 169 - Bab 18 (Prohibition of heresies in religion)
Chapter 1 (The Book of Miscellany)

'Aishah (May Allah be pleased with her) reported: Messenger of Allah (Peace be upon him) said, "If anyone introduces in our matter something which does not belong to it, will be rejected".

[Al-Bukhari and Muslim].

The narration in Muslim says: "If anybody introduces a practice which is not authenticated by me, it is to be rejected".

Selon ‘Aïcha (RA), le Messager de Dieu (saws) a dit : « Celui qui apporte dans notre religion-ci une innovation qui lui est étrangère, on doit rejeter tout ce qu’il dit ».

Hadith 170 - Bab 18 (Prohibition of heresies in religion)
Chapter 1 (The Book of Miscellany)

Jabir (May Allah be pleased with him) reported: Whenever the Messenger of Allah (Peace be upon him) delivered a Khutbah, his eyes would become red, his tone loud and he showed anger as if he were warning us against an army. He (Peace be upon him) would say, "The enemy is about to attack you in the morning and the enemy is advancing against you in the evening". He would further say, "I am sent with the final Hour like these two fingers of mine." Messenger of Allah (Peace be upon him) held up his index finger and the middle finger together to illustrate. He used to add: "To proceed, the best speech is the Book of Allah and the best guidance is the guidance of Muhammad (Peace be upon him), the worst practice is the introduction of new practices in Islam and every Bid'ah is a misguidance". He would also say, "I am, in respect of rights, nearer to every believer than his own self. He who leaves an estate, it belongs to his heirs, and he who leaves a debt, it is my responsibility to pay it off." [Muslim]. Same Hadith as reported by 'Irbad bin Sariyah (May Allah be pleased with him) has already been recorded in the previous chapter regarding safeguarding the Sunnah of the Prophet (Peace be upon him).

(See Hadith number 158)

Jaber (RA) a dit : « Quand le Messager de Dieu (saws) faisait un discours, ses yeux devenaient rouges, sa voix s’élevait et sa colère devenait grande comme quelqu’un qui nous annoncerait l’arrivée imminente de l’ennemi, disant :  « L’armée ennemi va vous attaquer ce matin ou ce soir ». Il disait : « J’ai été envoyé en même temps que l’Heure à l’image de ces deux doigts (et il réunissait l’index et le majeur) ». Il poursuivit en disant : « Or donc ! Le meilleur discours est le Livre de Dieu, la meilleure direction est celle de Mohammad (saws) et les pires choses sont les créations nouvelles. Toute innovation est source d’égarement ». Puis il disait : « Je suis plus digne de l’amour et de l’obéissance des Croyants que leurs propres personnes. Celui qui laisse des dettes ou des personnes à charge, c’est moi qui assume les unes et pourvois aux besoins des autres ». (Rapporté par Moslem)