Abu Turab (Father of the Earth).
Abaya bin Rabi narrates I asked Abdullah ibne Abbas (ra) why RasoolAllah (saw) gave Ali (asws) the title of “Abu Turab”.
He replied, “Because He is Master of the Earth and Allah’s
Hujjat (proof) for those who live on this earth. He is the cause of the survival and comfort of this earth. I heard RasoolAllah (saw) saying
“On the day of judgement, when kaffirs will see the honor and reward that will be given to the shia e Ali (asws), they will say “I wish I was a Shia e Ali (asws)”. This is what Allah has mentioned in Quran “and the kaffir will say alas I was a piece of earth”.”
Source : Maani ul Akbar pg 120#shiaislam #imamali#abuturab#yaalimadad#truepath