The Prophet ﷺ said: The Compassionate One has mercy on those who are merciful. If you show mercy to those who are on the earth, He Who is in the heaven will show mercy to you. Musaddad did not say: The client of 'Adb Allah b. 'Amr. He said: The Prophet ﷺ said.
النَّبِيَّ ﷺ الرَّاحِمُونَ يَرْحَمُهُمُ الرَّحْمَنُ ارْحَمُوا أَهْلَ الأَرْضِ يَرْحَمْكُمْ مَنْ فِي السَّمَاءِ لَمْ يَقُلْ مُسَدَّدٌ مَوْلَى عَبْدِ اللَّهِ بْنِ عَمْرٍو وَقَالَ قَالَ النَّبِيُّ ﷺ