عَنْ أَبِي أُمَامَةَ الْبَاهِلِيِّ رَضِيَ اللَّهُ عَنْهُ قَالَ سَمِعْتُ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَقُولُ فِي خُطْبَتِهِ عَامَ حَجَّةِ الْوَدَاعِ إِنَّ اللَّهَ قَدْ أَعْطَى كُلَّ ذِي حَقٍّ حَقَّهُ فَلَا وَصِيَّةَ لِوَارِثٍ الْحَدِيثَ
Narrated by Sayyiduna Abu Umamah Bahili (may Allah be pleased with him): He says, I heard the Messenger of Allah (peace and blessings be upon him) saying in the sermon during the year of the Farewell Pilgrimage: Allah Almighty has given every rightful person his due right, therefore, it is not permissible to make a bequest in favor of an heir. … al-Hadith