According to the article of October 21, 1180 in "Azuma Kagami," during Yoshitsune's stay in Oshu, he tried to hastily join Yoritomo to learn if Yoritomo had raised his army, but FUJIWARA no Hidehira strongly restrained him from doing so.
『吾妻鏡』治承4年（1180年）10月21日条よると、奥州にいた義経が頼朝の挙兵を知って急ぎ頼朝に合流しようとした際、藤原秀衡は義経を強く引き留める。