Narrated AbdurRahman ibn Awf:

I heard the Messenger of Allah ﷺ say: Allah the Exalted has said: I am Compassionate, and this has been derived from mercy. I have derived its name from My name. If anyone joins it, I shall join him, and if anyone cuts it off, I shall cut him off.

حَدَّثَنَا مُسَدَّدٌ، وَأَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ قَالاَ حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ أَبِي سَلَمَةَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَوْفٍ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ ﷺ يَقُولُ " قَالَ اللَّهُ أَنَا الرَّحْمَنُ وَهِيَ الرَّحِمُ شَقَقْتُ لَهَا اسْمًا مِنَ اسْمِي مَنْ وَصَلَهَا وَصَلْتُهُ وَمَنْ قَطَعَهَا بَتَتُّهُ " .