بُلُوغُ الْمَرَامِ
Bulugh al-Maram 957
Business Transactions
وَعَنْ أَبِي قِلَابَةَ , عَنْ أَنَسٍ قَالَ : قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{ أَفْرَضُكُمْ زَيْدُ بْنُ ثَابِتٍ } أَخْرَجَهُ أَحْمَدُ , وَالْأَرْبَعَةُ سِوَى أَبِي دَاوُدَ , وَصَحَّحَهُ اَلتِّرْمِذِيُّ , وَابْنُ حِبَّانَ , وَالْحَاكِمُ , وَأُعِلَّ بِالْإِرْسَالِ [1] .
Narrated Abu Qilabah on the authority of Anas (RA): Allah's Messenger (ﷺ) said: "The most versed in the rules of inheritance among you is Zaid bin Thabit." [Reported by Ahmad and al-Arba'a except Abu Dawud. at-Tirmidhi, Ibn Hibban and al-Hakim graded it Sahih (authentic). However, it was considered defective due to being Mursal (missing link in the chain after the Tabi'i)].
Sunnah.com reference: Book 7, Hadith 221