It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whatever inheritance was distributed in the time of Jahiliyyah will remain according to that distribution, and whatever inheritance Islam (its era) reached will be according to the distribution of Islam."
Only Uqayl (may Allah have mercy on him) narrated this hadith from Nafi' (may Allah have mercy on him), and only Ibn Lahi'ah (may Allah have mercy on him) from Uqayl (may Allah have mercy on him), while Muhammad bin Rumh (may Allah have mercy on him) is alone in narrating it.
Hadith Referenceالمعجم الأوسط / باب الألف / 230
Hadith Takhrij«أخرجه ابن ماجه فى «سننه» برقم: 2749، والطبراني فى «الأوسط» برقم: 6499»