بسم الله الرحمن الرحيم
Q: If the companions have consensus in a matter (whatever it may be), is it permissible for someone who comes after them to introduce a new statement (and or position in the matter)?
A: That would cause him to be susceptible to severe threat and extreme peril.
و من يشاقق الرسول من بعد ما تبيَّن له الهدى و يتَّبع غيرَ سبيل المؤمنين نولِّهِ ما تولَّى و نُصله جهنم و سائت مصيرًا
“And whoever opposes the Messenger after the guidance has been made clear to him, and follows other than the path of the believers, we will leave him upon what he has chose and will burn him in Hell what an evil destination.” [An-Nisaa: 115]
If it is established that the companions had consensus in an affair, the coming with another view is not permissible. This is exceeding their consensus, conflicting with the Book and the Sunnah, and opposing Allah, the Messenger, and the believers. In reality it is following other than their path and this is not permissible.
Translated by Najeeb Al Anjelesi
Source: فتاوى فضيلة الشيخ ربيع بن هادي المدخلي