Abu Bakr Mohammad bin Abdillah bin Hamdun narrated from Mohammad bin Ahmad, from Jaafar bin Mohammad bin Shaker the jeweler, from Mansour bin Safar, from Mahdi bin Maimun, from Mohammad bin Sireen, from his brother Maabad, from Abi Saeed Al-Khodri, who said:
The MESSENGER OF ALLAH (SWT) said:
Knowledge is divided in five parts. Four of those parts are given to ALI BIN ABI TALEB (ASWS) and the last part is shared among all people. I swear to ALLAH (SWT), who sent me as a Prophet, that ALI BIN ABI TALEB (ASWS) is more knowledgeable than all people, even in relation to the one part (of knowledge) that is given to them.
(Ref :Ghayatol Maram P512 H21 )