Assalam-o-Alaikum
So here i present some proofs that show that it is fardh to follow a fiqh.
now remember, that the majority of the Muslims follow a fiqh/madthab i.e. 85% of total Muslims Allhumdulilah.
“Hold fast to the rope of Allah, all of you, and do not split into factions” (3:103).
“And they were not divided until after the knowledge came unto them, through rivalry among themselves” (42:14).
“O you who believe, obey Allah and obey the Prophet and those of authority among you” (4:59).
“Whoever contraverts the Messenger after guidance has become clear to him and follows other than the believers’ way, We shall give him over to what he has turned to and expose him unto hell, and how evil an outcome!” (4:115).
“Restrain thyself along with those who call upon their Lord at morning and evening, seeking his pleasure; and let not thine eyes overlook them, desiring the pomp of this worldly life; and obey not him whose heart We have made heedless of Our remembrance, who followeth his own lust and whose case has gone beyond all bounds.” (18:28)
“Obey Allah and obey the Messenger and those who are in charge of affairs among you. Should you happen to dispute over something, then refer it to Allah and to the Messenger.” (4:58-59)
"You have to follow the Congregation for verily Allah will not make the largest group of Muhammad’s Community agree on error."Ibn Abi Shayba relates it with a sound chain.
"Verily Allah will not make Muhammad’s Community agree on error."al-Hakim narrated it in the Mustadrak (1:116, 177) with a sound (sahih) chain.
"Verily Allah will not make my Community agree on error"Tirmidhi with a fair (hasan) chain.
“Verily Allah will not make my Community – or Muhammad’s Community – agree on error, and Allah’s hand is with the largest Congregation.” Tirmidhi said: "And the meaning of "jamaa" according to the people of knowledge is: the people of jurisprudence, learning, and hadith."Tirmidhi (gharib) #2256, Cairo ed. Aridat al-ahwadhi (11:9).
the meaning of Umma in the preceding hadiths:
It means the overwhelming majority of the Muslims. This is the prevailing view, confirmed by many hadiths of the Companions, and also by the hadiths of the Prophet on jamaa and al-sawad al-azam.
"Whoever among you wants to be in the middle of Paradise, let him cling to the Congregation."Tirmidhi related it and said it is sound (sahih).
Shaytan is a wolf like the wolf that preys on sheep, taking the isolated and the stray among them; therefore, avoid factionalism and keep to the Congregation and the collective and the masjid."Ahmad relates it through Muadh and through Abu Dharr, the two chains being respectively fair [hasan] and sound [sahih] according to Haythami in Majma al-zawa’id.
"My Community shall never agree upon misguidance, therefore, if you see divergences, you must follow the greater mass or larger group."Ibn Majah (2:1303 #3950) Ahmad narrates it mawquf through three sound chains to Abu Umama al-Bahili and Ibn Abi Awfa. Bayhaqi in al-Madkhal narrates something similar from Ibn `Abbas.
My Community shall not agree upon misguidance. Therefore, you must stay with the Congregation, and Allah’s hand is over the Congregation."Tabarani narrated it with two chains from Ibn Umar, one of which is sound (sahih). See Haythami, Majma al-zawa’id, chapter on the obligation to stay with the Congregation.
"Verily Allah has protected my Community from agreeing upon error."Ibn Abi `Asim narrated it in the Sunna and Albani declared it hasan in his Silsila sahiha (3:319).
People used to ask the Prophet about the good and I used to ask him about the evil… I said: O Messenger of Allah, describe them to us [the callers at the door of the fire]. He said: They are of our complexion and they speak our very language. I said: What do you order me to do if that day reaches me? He said: You must keep to the Congregation of Muslims and to their leader."Bukhari and Muslim on the authority of Hudhayfa ibn al-Yaman.
"Allah’s hand is over the group."Tirmidhi (hasan).
al-Munawi said: “Allah’s hand is over the group means His protection and preservation for them, signifying that the collectivity of the people of Islam are in Allah’s fold, so be also in Allah’s shelter, in the midst of them, and do not separate yourselves from them. Whoever diverges from the overwhelming majority concerning what is lawful and unlawful and on which the Community does not differ has slipped off the path of guidance and this will lead him to hell.”
"Allah’s hand is over the group, and whoever dissents from them departs to hell."Tirmidhi (gharib) from Ibn Umar, al-Hakim both from Ibn Umar and Ibn Abbas, and Ibn Jarir from Ibn Umar.
"Allah’s hand is over the group, follow the largest mass, for verily whoever dissents from them departs to hell."Narrated by al-Hakim and al-Tabari from Ibn Abbas, and al-Lalika'i in al-Sunna and al-Hakim also narrated it from Ibn Umar.
“Allah’s hand is over the group, follow the largest mass, for verily whoever dissents from them departs to hell.” Narrated by al-Hakim and al-Tabari from Ibn Abbas, and al-Lalika'i in al-Sunna and al-Hakim also narrated it from Ibn Umar.
"Whoever leaves the Community or separates himself from it by the length of a span, dies the death of the Jahiliyya (period of ignorance prior to Islam)"Muslim (Imara #55) through Ibn `Abbas. Muslim relates it with slight variations through three more chains. Ibn Abi Shayba also relates it in his Musannaf.
"That which the Muslims consider good, Allah considers good."Ahmad in the Musnad (#3599) relates it from the words of Ibn Mas`ud (mawquf) with a sound chain.
The Holy Prophet Muhammad (sallal laahu alaihi wasallam) said: “There was disagreement amongst Jews and they split into 72 groups. In exactly the same way, there will be disagreement and divisions in my Ummah. It will split into 73 groups. Apart from one of those groups, all the remaining 72 will be thrown into Hell.” When asked which group will be on the right path, the Holy Prophet Muhammad (sallal laahu alaihi wasallam) replied: “The group on the right path, which will enter Paradise, will be the group which follows my Sunnah and that of my Sahaba and this will be the largest group of Muslims.” (Tirmidi, Imam Ahmad, Abu Daud, Mishkat)
The Holy Prophet Muhammad (sallal laahu alaihi wasallam) said: “Allah will never allow my Ummah to unite upon misguidance and incorrect beliefs. Allah’s mercy, blessings and protection are with the largest group of Muslims. And he who deviates from this largest group of Muslims will be thrown into Hell.”(Tirmidi)