Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
bayhaqi:21454Abū ʿAbdullāh al-Ḥāfiẓ > Abū al-ʿAbbās Muḥammad b. Yaʿqūb > Yaḥyá b. Abū Ṭālib > Yazīd b. Hārūn > Muḥammad b. Ṭalḥah b. Muṣarrif > Muʿāwiyah b. Isḥāq

[Machine] A man came to the Prophet ﷺ and said, "Indeed, so-and-so accepted Islam at my hands." The Prophet ﷺ said, "He is your mawla (a term indicating a relationship closer than a friend but not necessarily a blood relative). So, when you die, leave this message for him, as there is confirmation of the statement of Ibn Abbas regarding the abrogation of the verse of inheritance by a will. However, he should be given good counsel and treated well." And Allah knows best.  

البيهقي:٢١٤٥٤أَخْبَرَنَا أَبُو عَبْدِ اللهِ الْحَافِظُ ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا يَحْيَى بْنُ أَبِي طَالِبٍ أنبأ يَزِيدُ بْنُ هَارُونَ أنبأ مُحَمَّدُ بْنُ طَلْحَةَ بْنِ مُصَرِّفٍ عَنْ مُعَاوِيَةَ بْنِ إِسْحَاقَ قَالَ

جَاءَ رَجُلٌ إِلَى النَّبِيِّ ﷺ فَقَالَ إِنَّ فُلَانًا أَسْلَمَ عَلَى يَدِيَّ قَالَ هُوَ مَوْلَاكَ فَإِذَا مُتَّ فَأَوْصِ لَهُ هَذَا مُرْسَلٌ وَفِيهِ تَأْكِيدٌ لِقَوْلِ ابْنِ عَبَّاسٍ فِي نَسْخِ آيَةِ الْمُعَاقَدَةِ فِي الْمِيرَاثِ وَلَكِنْ يُوصِي لَهُ وَيُحْسِنُ إِلَيْهِ وَاللهُ أَعْلَمُ