Narrator:Zayd ibn Arqam
وَعَنْ زَيْدِ بْنِ أَرْقَمَ قَالَ: قَالَ أَصْحَابُ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: يَا رَسُولَ اللَّهِ مَا هَذِهِ الْأَضَاحِيُّ؟ قَالَ: «سُنَّةُ أبيكم إِبْرَاهِيم عَلَيْهِ السَّلَام» قَالُوا: فَمَا لَنَا فِيهَا يَا رَسُولَ اللَّهِ؟ قَالَ: «بِكُلِّ شَعْرَةٍ حَسَنَةٌ» . قَالُوا: فَالصُّوفُ يَا رَسُولَ اللَّهِ؟ قَالَ: «بِكُلِّ شَعْرَةٍ مِنَ الصُّوفِ حَسَنَة» رَوَاهُ أَحْمد وَابْن مَاجَه
Zaid b. Arqam said the companions of God’s Messenger asked him the significance of these sacrifices and he replied, “It is a custom which has come down from your father Abraham." They asked what reward they would receive for them and he replied, “For every hair you will receive a blessing." They asked about wool, and he replied, “For every strand of wool you will receive a blessing." Ahmad and Ibn Majah transmitted it.
Reported by Ibn Majah (No. 3127) and Ahmad (No. 18480). Cited in Mishkat al-Masabih (No. 1476).