On the authority of Abdullah Ibn Masud (may Allah be pleased with him) who said: The Messenger of Allah (peace be upon him) said:“It is not permissible to spill the blood of a Muslim except in three [instances]: the married person who commits adultery, a life for a life, and the one who forsakes his religion and separates from the community.” [Al-Bukhari & Muslim]

عَنْ ابْنِ مَسْعُودٍ رَضِيَ اللهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صلى الله عليه و سلم

“لَا يَحِلُّ دَمُ امْرِئٍ مُسْلِمٍ [ يشهد أن لا إله إلا الله، وأني رسول الله] إلَّا بِإِحْدَى ثَلَاثٍ: الثَّيِّبُ الزَّانِي، وَالنَّفْسُ بِالنَّفْسِ، وَالتَّارِكُ لِدِينِهِ الْمُفَارِقُ لِلْجَمَاعَةِ”. [رَوَاهُ الْبُخَارِيُّ] ، [وَمُسْلِمٌ].

Forbiddence of Anger

On the authority of Abu Hurayrah (may Allah be pleased with him):

“A man said to the Prophet, ‘Give me advice.’ The Prophet, peace be upon him, said, ‘Do not get angry.’ The man asked repeatedly and the Prophet answered each time, ‘Do not get angry.’” Related by Bukhari & Muslim

Slaughter an Animal

On the authority of Abu Ya’la Shaddad bin Aws (may Allah be pleased with him), that the Messenger of Allah (peace be upon him) said:

“Verily Allah has prescribed ihsan (perfection) in all things. Thus if you kill, kill well; and if you slaughter, slaughter well. Let each one of you sharpen his blade and let him spare suffering to the animal he slaughters.” [Muslim]