that Abū Yūsuf said it is one thousand one hundred. Ibn al-Mubārak said, "Abū Yūsuf takes those trivial matters from here and there, like the weak ḥadīths"
إِن أَبَا يُوسُف قَالَ هِيَ ألف وَمِائَة قَالَ ابْن الْمُبَارك أَبُو يُوسُف يَأْخُذ بِتِلْكَ الهنات من هُنَا وَهنا نَحْو الْأَحَادِيث الضعيفة
Clarifying what contains severe weakness
يبين مَا فِيهِ وَهن شَدِيد
Whatever is in my book of ḥadīths that contains severe weakness, I have clarified it and among them are those whose isnād is not authentic
وَمَا كَانَ فِي كتابي من حَدِيث فِيهِ وَهن شَدِيد فقد بَينته وَمِنْه مَالا يَصح سَنَده
What is left unmentioned is sound
الْمَسْكُوت عَنهُ صَالح
Whatever I have not mentioned anything about, it is sound and some are more authentic than others and if someone other than me had compiled it, I would have said more about it
مَا لم أذكر فِيهِ شَيْئا فَهُوَ صَالح وَبَعضهَا أصح من بعض وَهَذَا لَو وَضعه غَيْرِي لَقلت أَنا فِيهِ أَكثر
His thoroughness
استقصاؤه
It is a book in which no sunnah from the Prophet (ṣallá Allāhu ʿalayhi wa-sallam) with a sound isnād is mentioned
وَهُوَ كتاب لَا ترد عَلَيْك سنة عَن النَّبِي ﷺ بِإِسْنَاد صَالح إِلَّا