Ibn 'Umar (RAA) narrated, 'A young boy was murdered deceitfully. 'Umar (RAA) thereupon said, 'If all the people of San'a' (in Yemen) participated in killing him, I would kill them all.' Related by al-Bukhari. (ES)
English reference (ES): Book 9, Hadith 1215 (ES)
Arabic reference (ES): Book 9, Hadith 1185 (ES)