Hadithcore
Sahih Muslim, 1629
sahih

Ibn 'Abbas (Allah be pleased with them) said:

(I wish) if people would reduce from third to fourth (part for making a will of their property), for Allah's Messenger (ﷺ) said: So far as the third (part) is concerned it is quite substantial. In the hadith transmitted on the authority of Waki (the words are)" large" or" much".

حَدَّثَنِي إِبْرَاهِيمُ بْنُ مُوسَى الرَّازِيُّ، أَخْبَرَنَا عِيسَى يَعْنِي ابْنَ يُونُسَ، ح وَحَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَأَبُو كُرَيْبٍ قَالاَ حَدَّثَنَا وَكِيعٌ، ح وَحَدَّثَنَا أَبُو كُرَيْبٍ، حَدَّثَنَا ابْنُ نُمَيْرٍ، كُلُّهُمْ عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، عَنِ ابْنِ عَبَّاسٍ، قَالَ لَوْ أَنَّ النَّاسَ، غَضُّوا مِنَ الثُّلُثِ إِلَى الرُّبُعِ فَإِنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ الثُّلُثُ وَالثُّلُثُ كَثِيرٌ ‏"‏ ‏.‏ وَفِي حَدِيثِ وَكِيعٍ ‏"‏ كَبِيرٌ أَوْ كَثِيرٌ ‏"‏ ‏.‏

Isnad

9 transmitters
  1. 1Ibrahim bin Musa al-Razi al-Fara'al-Ray' · d. after 220 AH
  2. 2'Isa bin Yonus bin Abi IshaqKufa,al-Syria · d. 191 AH
  3. 3Abu Bakr bin Abi ShaybaKufa · d. ~235 AH
  4. 4Abu Karayb, Muhammad bin al-'Ala'Hamadan,al-Kufa · d. 247 AH
  5. 5Waki' bin al-JarrahKufa · d. ~197 AH
  6. 6Abu Karayb, Muhammad bin al-'Ala'Hamadan,al-Kufa · d. 247 AH
  7. 7Hisham bin 'UrwaMedina · d. 146 AH
  8. 8'Urwa ibn al-ZubayrMedina · d. 93 AH/713 CE
  9. 9ibn AbbasMakkah/Medina · d. 68 AH/687 CE
References2 variants
In-Book Reference
Book 25, Hadith 15
USC-MSA web (English) reference
Book 13, Hadith 4000 (deprecated numbering scheme)