Hadith

 حَدَّثَنَا أَبِي رَحِمَهُ اَللَّهُ عَنِ اَلْعَلاَءِ بْنِ اَلْفُضَيْلِ عَنِ اَلصَّادِقِ ع قَالَ : مَنْ أَحَبَّ كَافِراً فَقَدْ أَبْغَضَ اَللَّهَ وَ مَنْ أَبْغَضَ كَافِراً فَقَدْ أَحَبَّ اَللَّهَ ثُمَّ قَالَ ع صَدِيقُ عَدُوِّ اَللَّهِ عَدُوُّ اَللَّهِ.

 Mohammed bin al-Hasan bin Ahmed bin al-Waleed narrated to us from Ahmed bin Idris from Ja’far bin Mohammed Bin Malik al-Fazari from Mohammed bin al-Hussein bin Zaid from Mohammed bin Sinan from al-Alaa bin al-Fudhayl that Imam as-Sadiq (a) said: He who loves a disbeliever will hate Allah and whoever hates a disbeliever loves Allah. He (a) then added: The friend of Allah’s enemy is Allah’s enemy.

Ṣifāt al-Shīʿa

Book 1, Chapter 15