Sayyidina Abdur Rahaman ibn Awf (RA) narrated: I heard Allah’s Messenger (SAW) say that Allah, the Blessed and the Exalted, said, “I am Allah and I am Ar – Rahman (the Compassionate). I created Ar-Rahim ties of relationsip, and carved it out of my name. Thus he who joins it, I join him and he who severs it, I sever him.”
[Bukhari 53]