Taqleed of the 4 Mazhab

According to Allaamah Shah Waliyullah Dehlavi (Rahmatullahi alayh), the whole 'Ummah made Ijma, that is, they all agree that it is permissible to follow the 4 Mazhab that have been compiled with all details in order to answer to all the questions of life. To follow these Mazhab is following As-Sawaad-ul-A'zam (the vast majority) that Rasulullah (Sallallaahu Alaihi Wasallam) has commanded to follow.

[English version of "Taqleed de 4 mazhab" – Al Jamiat – Vol.2 No.13]