Sunan Abi Dawud 1694
سنن أبي داود#1694SahihNarrated 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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Zubair Ali ZaiSahih
In-book reference: 9:139