Authentic
Sunan Abu Dawud 4955
When Hani went with his people in a deputation to the Messenger of Allah (ﷺ), he heard them calling him by his kunyah (surname), AbulHakam. So the Messenger of Allah (ﷺ) called him and said: Allah is the judge (al-Hakam), and to Him judgment belongs. Why are you given the kunyah AbulHakam? He…
إِنَّ اللَّهَ هُوَ الْحَكَمُ وَإِلَيْهِ الْحُكْمُ فَلِمَ تُكْنَى أَبَا الْحَكَمِ " . فَقَالَ إِنَّ قَوْمِي إِذَا اخْتَلَفُوا فِي شَىْءٍ أَتَوْنِي فَحَكَمْتُ بَيْنَهُمْ فَرَضِيَ كِلاَ الْفَرِيقَيْنِ . فَقَالَ…