It is narrated from Abdur Rahman bin Muhammad, may Allah have mercy on him, that he said: Sayyiduna Ibn Umar, may Allah be pleased with them both, passed by a Christian and greeted him with salam, and he replied. Later, it was told to him that he was a Christian. When he came to know this, he went to him and said: Return my salam to me.
Hadith Referenceالادب المفرد / كتاب أهل الكتاب / 1115
Hadith Gradingالألبانی:حسن
Hadith Takhrij«حسن : أخرجه عبدالرزاق : 19458 و البيهقي فى شعب الإيمان : 8906 - أنظر الإرواء : 1274»