Part of it is from the hadith of Abu Bakr Muhammad bin Al-Hasan

Translation

This book deals with Al-Attar’s hadiths about his sheikhs, and presents the chain of narration by mentioning the names of the sheikhs from whom he narrated, starting with Abu Bakr Muhammad bin Al-Hasan bin Yaqoub bin Muqasim Al-Attar and finally ending with Sheikh Al-Islam Abu Al-Fadl Ahmed bin Ali Al-Asqalani. The book focuses on describing how hadiths were transmitted through a chain of narrators, relying on authorizations and hearing aids between them.