Ibn Abbas narrates that the Messenger of Allah (ص) said:
"The love of Ali ibn Abi Talib consumes the sins just as fire consumes firewood"
Dailami, Ferdaus al-Akhbar, V. 2, page 226; Ibn Asaker, Tarikh Madinah-Damishq, V.13, page 52; Ibn Demeshqi, Jawaher al-Matalib, V.1, page 252; Kanani, Tanzih al-Shari’ah, V.1, page 355; shawkani, Al-Fawaid al-Majmu’a, page 367.