السلام
كلمة (السلام) في اللغة مصدر من الفعل (سَلِمَ يَسْلَمُ) وهي...
Abu Sa‘īd al-Khudri (may Allah be pleased with him) reported that the Prophet (may Allah's peace and blessings be upon him) said: "The best Jihad is to speak a word of justice to an oppressive ruler."
شرح الحديث :
The Prophet (may Allah's peace and blessings be upon him) explains in this Hadīth that the greatest way through which a person can strive in the cause of Allah is to speak a word of truth in the presence of an oppressive ruler, since that word could be a reason for that ruler to take revenge on him or inflict harm upon him.