Ibn 'Umar said:A boy was assassinated. 'Umar said, "If all the people of San'a took part in the assassination I would kill them all."Al-Mughira bin Hakim said that his father said, "Four persons killed a boy, and 'Umar said (as above)."Abu Bakr, Ibn Az-Zubair, 'Ali and Suwaid bin Muqarrin gave the judgement of Al-Qisas (equality in punishment) in cases of slapping. And 'Umar carried out Al-Qisas for a strike with a stick. And 'Ali carried out Al-Qisas for three lashes with a whip. And Shuraih carried out for one last and for scratching.
وَقَالَ لِي ابْنُ بَشَّارٍ حَدَّثَنَا يَحْيَى، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ أَنَّ غُلاَمًا، قُتِلَ غِيلَةً فَقَالَ عُمَرُ لَوِ اشْتَرَكَ فِيهَا أَهْلُ صَنْعَاءَ لَقَتَلْتُهُمْ. وَقَالَ مُغِيرَةُ بْنُ حَكِيمٍ عَنْ أَبِيهِ إِنَّ أَرْبَعَةً قَتَلُوا صَبِيًّا فَقَالَ عُمَرُ مِثْلَهُ. وَأَقَادَ أَبُو بَكْرٍ وَابْنُ الزُّبَيْرِ وَعَلِيٌّ وَسُوَيْدُ بْنُ مُقَرِّنٍ مِنْ لَطْمَةٍ. وَأَقَادَ عُمَرُ مِنْ ضَرْبَةٍ بِالدِّرَّةِ. وَأَقَادَ عَلِيٌّ مِنْ ثَلاَثَةِ أَسْوَاطٍ. وَاقْتَصَّ شُرَيْحٌ مِنْ سَوْطٍ وَخُمُوشٍ.
Bukhari
Blood Money (Ad-Diyat) • Hadith 35