[22].Surah Al-Hajj [The Pilgrimage]: Ayat 36

Ayat 36. And the Budn (cows, oxen, or camels driven to be offered as sacrifices by the pilgrims at the sanctuary of Makkah.) Allah have made for you, as among the Symbols of Allah, therein you have much good. So mention the Name of Allah over them when they are drawn up in lines (for sacrifice). Then, when they are down on their sides (after slaughter), eat thereof, and feed the beggar who does not ask (men), and the beggar who asks (men). Thus have We made them subject to you that you may be grateful.

[Tafseer] The sacrificial camels we have made for you as among the symbols from Allah. in them is (much) good for you: then pronounce the name of Allah over them as they line up (for sacrifice): when they are down on their sides (after slaughter), eat ye thereof, and feed such as (beg not but) live in contentment,(2814) and such as beg with due humility: thus have We made animals subject to you, that ye may be grateful. What was expressed in general terms is applied here more particularly to camels, the most precious and useful animals of Arabia , whose mode of slaughter for sacrifice is different from that of smaller animals: the special word for such sacrifice is Nahr (108:2). There are ethics in begging, as in charity. No approval is given to arrogant and insolent begging, though the relief of distress of all kinds, deserved and undeserved, is included in charity. But those who beg with humility and those who receive gifts with gratitude and contentment are both mentioned for special attention. Charity should not be given for show, or to get rid of importunate demands. It should find out real needs and meet them.

Hazrat Abu Ya'la Shaddad bin Aus (May Allah be pleased with him) reported: Messenger of Allah [SAWW](PBUH) said, "Verily Allah has prescribed Ihsan (kindness) for everything. So when you kill, you must make the killing in the best manner; when you slaughter, make your slaughter in the best manner. Let one of you sharpen his knife and give ease to his animal (in order to reduce his pain).''

[Muslim Book 21, Chapter 11, Hadith # 4810] 

Lesson : as mentioned above in Surah Al-Hajj Ayat 36."So mention the Name of Allah over them when they are drawn up in lines (for sacrifice)" By killing is meant the killing of a harmful animal, or the killing of a murderer as retribution and the killing of the enemy in the battlefield. All these situations warrant killing but with a stress on moderation, thanks to Islamic teachings. A believer is told not to let his passions of enmity go wild, and even an enemy or a criminal ought not to be put to a torturous death. In the Pre-Islamic Period of Ignorance it was a prevalent practice that the limbs of a victim were mutilated before he was finally killed. Islam has forcefully forbidden this inhuman custom, stating that the victim should be beheaded with the one swing of sword. Similarly, there are specific instructions regarding an animal's slaughter. First, the knife should be sharpened. Second, the animal must not be slaughtered from its nape, because in both ways it will suffer pain. This Shari`ah rule ensures quick death of the animal.