hadith
7392
۞
Imam Ali (AS) said, One who assists [a disbeliever] against a Muslim has indeed exited from the fold of Islam.
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : مَنْ أعانَ عَلى مُسْلِم فَقدْ بَرِئَ مِنَ الإسْلامِ