قَالَ مُصَنِّفُ هَذَا الْكِتَابِ رَحِمَهُ اللَّهُ كَانَ أَصْحَابُ الْأَمْوَالِ فِيمَا مَضَى يُجَزِّءُونَ أَمْوَالَهُمْ فَمِنْهُمْ مَنْ يَجْعَلُ أَجْزَاءَ مَالِهِ عَشَرَةً وَ مِنْهُمْ مَنْ يَجْعَلُهَا سَبْعَةً فَعَلَى حَسَبِ رَسْمِ الرَّجُلِ فِي مَالِهِ تُمْضَى وَصِيَّتُهُ وَ مِثْلُ هَذَا لَا يُوصِي بِهِ إِلَّا مَنْ يَعْلَمُ اللُّغَةَ وَ يَفْهَمُ عَنْهُ فَأَمَّا جُمْهُورُ النَّاسِ فَلَا تَقَعُ لَهُمْ الْوَصَايَا إِلَّا بِالْمَعْلُومِ الَّذِي لَا يَحْتَاجُ إِلَى تَفْسِيرِ مَبْلَغِهِ فَإِذَا أَوْصَى رَجُلٌ بِمَالٍ كَثِيرٍ أَوْ نَذَرَ أَنْ يَتَصَدَّقَ بِمَالٍ كَثِيرٍ فَالْكَثِيرُ ثَمَانُونَ وَ مَا زَادَ لِقَوْلِ اللَّهِ تَبَارَكَ وَ تَعَالَى لَقَدْ نَصَرَكُمُ اللَّهُ فِي مَواطِنَ كَثِيرَةٍ وَ كَانَتْ ثَمَانِينَ مَوْطِناً.
The author of this book, may Allah سبحانه وتعالى have mercy on him, explains that in the past, wealthy individuals would divide their wealth into portions. Some would divide their wealth into ten parts, while others would divide it into seven. Therefore, a person's will should be executed according to how they customarily divided their wealth. Such specific forms of bequests are usually made by those well-versed in language and understanding. However, for the majority of people, wills are generally made in clear and specific terms that require no further interpretation. If a person makes a will or vows to give away "a large amount" of wealth, then the interpretation of "a large amount" is considered to be eighty or more, based on the verse of Allah سبحانه وتعالى, the Exalted: "Indeed, Allah سبحانه وتعالى has given you victory in many (kathirah) battlefields" (Surah At-Tawbah 9:25), where "many" referred to eighty instances of victory.