«كان إذا خطب احمرت عيناه وعلا صوته واشتد غضبه كأنه منذر جيش يقول: صبحكم ومساكم»
It was the practice of the Prophet (peace and blessings be upon him):
"When he (peace and blessings be upon him) delivered a sermon, his (peace and blessings be upon him) eyes would turn red, his voice would rise and his anger would intensify, as though he (peace and blessings be upon him) were someone warning of an army's attack, saying: The enemy is about to attack you in the morning or the evening."
Hadith Referenceصحیح الجامع الصغیر / حرف الكاف / 4711
Hadith Gradingالألبانی:صحيح
Hadith Takhrij[هـ حب ك] عن جابر. مختصر مسلم ٤١٠، الإرواء ٦٠٨، ٦١١.