Holy Prophet Muhammad al Mustafā (salla llāhu ʿalayhi wa-alehe wa-sallam) said:
“Ali (alayhi salām)’s love is such virtue that no evil can harm. His hatred is such evil that no virtue will be of benefit.”
[Alhe Sunnah Reference: Yanabil Muwaddah pg 239]
Holy Prophet Muhammad al Mustafā (salla llāhu ʿalayhi wa-alehe wa-sallam) said:
"When Allāh (Subhānahu wa ta'alā)) created the Heavens and the Earth, He called on them and they responded, He presented my Prophethood and the Wilayat (Unconditional, Unlimited Authority) of Ali bin Abi Taleb (AS) to them, both of which they accepted. Then Allāh (Subhānahu wa ta'alā)) created the creatures and entrusted the religious affairs to us. Therefore, the happy ones are those who are happy with us, and the unhappy ones are those who are unhappy with us. We permit that which Allāh (Subhānahu wa ta'alā)) has made Halal (Lawful) and prohibit that which Allāh (Subhānahu wa ta'alā)) has deemed Haraan (Unlawful)"
[Reference: Bihar Ul Anwar, Vol. 17, Pg. 13, H25. Khawarezimi in Manaqeb Pg. 79]
Holy Prophet Muhammad al Mustafā (salla llāhu ʿalayhi wa-alehe wa-sallam) said:
The first from the heavens who made Amir al-Mu'minin (alayhi salām) as his brother was Israfeel (alayhi salām). Then Jibrael (alayhi salām) made Moula Ali (alayhi salām) his Brother. The first who loved Moula Ali (alayhi salām) was the Arsh. Then the angels of jannah. Then the angel of death. The angel of death is kind to the lovers of Moula Ali (asws) the way He is kind to the prophets (as).”
[Reference: Irshad ul Quloob Second Edition pg 235, narrated by Abullah bin Masood]
Sama bin Mahran narrates, “I asked
Imām Ja'far ibn Muhammad al-Sādiq (alayhi salām) regarding this ayah,
“Be faithful to your promise with Me and I will fulfill My promise with you” (2:40), Imam (alayhi salām) said, “That promise of Allāh is Wilayat e Ali (alayhi salām). It is wajib upon you from Allāh .Fulfill it and Allāh will fulfill His promise of jannah with you.”
[Reference: Tafseer e Ayyashi First Edition pg 60]