Mujahid reported: We were with Abdullah ibn Amr and his servant was preparing a roasted sheep. Abdullah said, “Young man, when you are finished, then begin with our Jewish neighbor.” A man said, “Jewish? May Allah rectify you!” Abdullah said, “I heard the Prophet, peace and blessings be upon him, enjoining good treatment of our neighbors so often that we feared he would make them our heirs.”
Source: al-Adab al-Mufrad 105
Grade: Sahih (authentic) according to Al-Albani
عَنْ مُجَاهِدٍ قَالَ كُنْتُ عِنْدَ عَبْدِ اللهِ بْنِ عَمْرٍو وَغُلاَمُهُ يَسْلُخُ شَاةً فَقَالَ يَا غُلاَمُ إِذَا فَرَغْتَ فَابْدَأْ بِجَارِنَا الْيَهُودِيِّ فَقَالَ رَجُلٌ مِنَ الْقَوْمِ الْيَهُودِيُّ أَصْلَحَكَ اللَّهُ قَالَ إِنِّي سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يُوصِي بِالْجَارِ حَتَّى خَشِينَا أَوْ رُئِينَا أَنَّهُ سَيُوَرِّثُهُ
105 الأدب المفرد كتاب الجار باب جار اليهودي
المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الأدب المفرد 95