Sunan at-Tirmithiy كتاب البر والصلة باب ما جاء فى رحمة المسلمين

حَدَّثَنَا ابْنُ أَبِى عُمَرَ حَدَّثَنَا سُفْيَانُ عَنْ عَمْرِو بْنِ دِينَارٍ عَنْ أَبِى قَابُوسَ عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم الرَّاحِمُونَ يَرْحَمُهُمُ الرَّحْمَنُ ارْحَمُوا مَنْ فِى الأَرْضِ يَرْحَمْكُمْ مَنْ فِى السَّمَاءِ الرَّحِمُ شُجْنَةٌ مِنَ الرَّحْمَنِ فَمَنْ وَصَلَهَا وَصَلَهُ اللَّهُ وَمَنْ قَطَعَهَا قَطَعَهُ اللَّهُ. قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ.
The Messenger of God, peace and blessings of God be upon him, said, "The merciful [among you] will receive the mercy of [God] the All-Merciful; have mercy on those on Earth to receive the mercy of those in the heavens (1). Kinship stems from the All-Merciful (2); so whoever preserves its ties, God will preserve ties with him; and whoever cuts them off, God will cut him out [of his mercy]." Footnotes: (1) This may mean God or it may mean the angels whose mercy upon the believers is to pray for them and ask God to forgive them. (2) The word kinship in Arabic (ar-Ra ḥim) and the word All-Merciful (ar-Raḥmān) have the same root (raḥima) to be merciful. So just as the two words are related linguistically, they are related metaphysically. Click on ḥadīth to read more