Musnad Othman bin Affan by Abu al-Qasim al-Baghawi. It is

Translation

This book is a Musnad for Othman bin Affan, may God be pleased with him, written by Abu al-Qasim al-Baghawi, and it contains hadiths and narrations from the great companion Othman bin Affan, may God be pleased with him. The book deals with multiple topics from Uthman’s life, his fatwas, and his sayings, relying on a series of narrators connected to the companion. The book is one of the hadith parts that aims to collect hadiths related to the personality of Uthman ibn Affan and classify them in a systematic manner.