There are many Hadith which establish the compulsory nature of Taqleed. A few among them are being presented here.
There is a Hadith in Sahih Bukhari:
Translation of Hadith: You follow me and the later ones will follow you. (Sahih Bukhari, Vol. 1, Pg. No. 99)
Hafidh Ibn Hajar ‘Asqalani writes in the interpretation of this Hadith:
Translation: You learn the rules of the Shariah from me, so that those who come after you can learn from you and in the same way those who come after them and so on until the end of the world.