Habeeb bin Abi Tahbit, from Saeed bin Jobair, from Ibne Abbas, who said:
The MESSENGER OF ALLAH (SWT) said to Um Salamah:
This is ALI BIN ABI TALEB (ASWS). His flesh is my flesh and his blood is my blood, ALI (ASWS) is to me like Haroun (A.S.) was to Musa (A.S.) , except that ther isno PROPHET after me.
O Um Salamah! This is ALI (ASWS) the Commander of the Believers, the Master of the Muslims, ALI (ASWS) is the keeper of my knowledge and he is the door that opens to me.
ALI (ASWS) is my brother in this life and in the Hereafter, and he will be with me at the highest levels of paradise.
ALI (ASWS) will kill the disloyal ones, the perfidious, and the apostates.
(Ref: Bihar Al-Anwar 37:337)