حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ حَدَّثَنَا نَافِعُ بْنُ عُمَرَ عَنِ ابْنِ أَبِي مُلَيْكَةَ قَالَ كَتَبَ إِلَيَّ ابْنُ عَبَّاسٍ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لَوْ أَنَّ النَّاسَ أُعْطُوا بِدَعْوَاهُمْ ادَّعَى نَاسٌ مِنْ النَّاسِ دِمَاءَ نَاسٍ وَأَمْوَالَهُمْ وَلَكِنَّ الْيَمِينَ عَلَى الْمُدَّعَى عَلَيْهِ
مسند امام احمد بن حنبل · Hadith 3188
It was narrated that Ibn Abi Mulaikah said: Ibn 'Abbas (RA) wrote to me (saying): The Messenger of Allah (PBUH) said: "If people were to be given on the basis of what they claim, some people would claim the lives and wealth of others. But the one against whom a claim is made should swear an oath."
Sanad
حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ حَدَّثَنَا نَافِعُ بْنُ عُمَرَ عَنِ ابْنِ أَبِي مُلَيْكَةَ قَالَ كَتَبَ إِلَيَّ ابْنُ عَبَّاسٍ