He appears in 627 during the siege of the Banu Qurayza, a Jewish tribe in conflict with Muhammad. The Qurayza had a long-standing alliance with the Aws and during the siege asked to confer with Abu Lubaba. According to Ibn Ishaq, Abu Lubaba felt pity for the women and children of the tribe who were crying and when asked whether the Qurayza should surrender to Muhammad, advised them to do so.
