Hadith

 حَدَّثَنَا مُحَمَّدُ بْنُ اَلْحَسَنِ بْنِ اَلْوَلِيدِ عَنْ مُحَمَّدِ بْنِ اَلْحَسَنِ اَلصَّفَّارِ عَنْ مُحَمَّدِ بْنِ عِيسَى بْنِ عُبَيْدٍ عَنِ اِبْنِ فَضَّالٍ قَالَ سَمِعْتُ اَلرِّضَا ع يَقُولُ مَنْ وَاصَلَ لَنَا قَاطِعاً أَوْ قَطَعَ لَنَا وَاصِلاً أَوْ مَدَحَ لَنَا عَائِباً أَوْ أَكْرَمَ لَنَا مُخَالِفاً فَلَيْسَ مِنَّا وَ لَسْنَا مِنْهُ.

 Mohammed bin al-Hasan bin al-Waleed related to us from Mohammed bin al-Hasan as-Saffar from Mohammed bin Easa bin Ubaid from Ibn Faddhal that Imam ar-Ridha (a) said: As for anyone who builds relations with somebody who disregards us, disregards somebody who builds good relations with us, praises somebody who reviles at us, or honors somebody who dissents from us, he is surely not one us and we are surely not from him.

Ṣifāt al-Shīʿa

Book 1, Chapter 10