He was the son of Shmuel Binyamin Sofer ( `` Ksav Sofer '' ) and grandson of the Moses Sofer ( the `` Chasam Sofer '' ) .
He was the son of Shmuel Binyamin Sofer ( `` Ksav Sofer '' ) and grandson of Moses Sofer ( the `` Chasam Sofer '' ) .