Silsilat al-Ahadith al-Sahihah

It is narrated from Sayyiduna Jabir (may Allah be pleased with him), the Noble Prophet (peace and blessings be upon him) said: “(Two servants of Allah) are the leaders of the martyrs: (1) Hamzah bin Abdul Muttalib and the man who commanded a tyrant ruler (according to the Shari’ah) and forbade (him from unlawful matters), but the ruler killed him.”