Mohammad bin ALI bin Sokkar narrated from Mohammad bin Qassem, from Abbad bin Ya’qoub, from Shareek, from Rakeen bin Rabi’, from Qassem bin Hassaan, from Zaid bin Thabit, who said:
The MESSENGER OF ALLAH (SWT) said, “I leave behind two important weights: the Qur'an and ALI BIN ABI TALEB (ASWS). Understand that ALI BIN ABI TALEB (ASWS) is better than the Qur'an because he is the interpreter of the Qur'an for you.”
(Ref : Ghayatol Maram P214 H20. Al-Borhan V1 P28 H15. Irshad Al-Gholoub P387)