Definition of BID'AH SAYYIAH

Bid'ah say'iah is a new thing, introduced to and made part of the Deen (Islam) that has no origin what so ever from the Qur'an or the Sunnah of Rasoolallah [May Allah bless Him and grant Him peace] 

Imam Bukhari and Imam Muslim write that there was some companions talking and the Prophet was listening. One of them said: 'I will make prayers (Salaah) all night long.' The second said: 'I will fast (sawm) all the time.' The third said: 'I will never marry.' When our Prophet [May Allah bless Him and grant Him peace]heard them say this he said: 'I am the most God conscious of Allah (Ta`ala) than any of you. I pray (Salaah,) I fast (sawm) as well, and I do marry woman too. And who so turns his face from my Sunnah, cannot be of my Ummah'. 

[Mishkat Muslim, Bukhari chapter Ihtisam]

The reason why our Prophet [May Allah bless Him and grant Him peace]stopped them from doing what they wanted to do was because it was against Sunnah(his way). What ever we do which is against the way of our Prophets [May Allah bless Him and grant Him peace] Sunnah is a Bid'ah Say'iah. 

RasoolAllah [May Allah bless Him and grant Him peace] stated: "On the Day of Judgement, some people will come to me when I will be standing by Haudh-e-Kauser (Well). They will be grabbed and taken towards the Hellfire. I shall say: "These are my people" but in reply I will be told: "These are the people who introduced innovations after you, so they are unbelievers." 

[Bukhari & Muslim, Kitaab-ul-Haudh]

From the above Hadith we learn of the innovations from which we have been warned. Such innovations that make a person Murtad (a non believer.) A few examples of innovations, which cause a person to become Murtad:- A person claiming to be a Prophet, deny giving Zakaat. Perform Haj at a place other than the Ka'ba, or to introduce any other new belief which is in opposition to Qur'an or Ahadith. 

A person once sent salaam to Abdullah Ibn Umar radhiAllahu anhu who replied: I do not accept his salaam, as this person has innovated by becoming Qadriyyah (A sect which does not believe in destiny) [Mistake, Kitaab-ul-Iman wa-al-Qadr, transmitted by Abu Dawood, Tirmidhi and Ibn Majah]

The above narration emphasises the fact that Bid'ah is to hold such an Aqeedah which is in direct opposition to the Qur'an and Sunnah, i.e. to become Qadriyyah, Jabriyya etc. 

RasoolAllah [May Allah bless Him and grant Him peace] stated: "Every innovation leads astray and every creator of the astray goes in the Fire." 

[Muslim chapter Al-jumah]

An example of this Bid'ah is given by Hafidhh Ibn Al-Qayyim who writes: 'The one who denies the punishment of the grave is an innovater'. 

[Kitaab-ur-Rooh chap10]