Analysis of information sources in references of the Wikipedia article "Slavery and religion" in English language version.
The Qur'an, like the Old and the New Testaments, assumes the existence of slavery. It regulates the practice of the institution and thus implicitly accepts it. The Prophet Muhammad and those of his Companions who could afford it themselves owned slaves; some of them acquired more by conquest.
the believing slave is now the brother of the freeman in Islam and before God, and the superior of the free pagan or idolator (11:221).
The freeing of slaves is recommended both for the expiation of sins (IV:92; V:92; LVIII:3) and as an act of simple benevolence (11:177; XXIV:33; XC:13).
This point is emphasized and elaborated in innumerable hadiths (traditions), in which the Prophet is quoted as urging considerate and sometimes even equal treatment for slaves, denouncing cruelty, harshness, or even discourtesy, recommending the liberation of slaves, and reminding the Muslims that his apostolate was to free and slave alike.
The Hanafites, however, follow a different criterion with regard to retaliation for homicide. For them the permanent protection of life ('isma) is the basis of the required equivalence and not the value of the bloodprice. Thus in Hanafite law a Muslim may be executed for killing a dhimmı (but not for killing a musta'min because his protection is only temporary), and a free man for killing a slave.
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: CS1 maint: location missing publisher (link)Several of these verses mandate the freeing of slaves as expiation for sin or crimes and they also establish the emancipation of a slave as a meritorious and pious act, entitling the emancipator to favorable treatment in the next life.
These verses recommend gradual steps to end slavery. As Muhammad Asad points out, "the institution of slavery is envisaged in the Quran as a mere historic phenomenon that must in time be abolished." Indeed, the Qur'anic prescriptions of manumission are expressed in the Qur'an as pious deeds, clearly implying that ending slavery was a crucial goal in Islam at times when slavery formed a fundamental part of human culture.
Ironically the Hadith did not specifically advocate the abolition of slavery; instead the Hadith was used to create practical advancement in the history of slavery. I want to illustrate this by citing examples from as-Sahih of al-Bukhari that are consistent or contradictory with the message of the Qur'an.
THE KOR'AN. [...] Spiritually, the slave has the same value as the free man [...] over and over again, from beginning to end of the Preaching, it makes the emancipation of slaves a meritorious act: a work of charity (ii, 177; xc,13), to which the legal alms may be devoted (ix,60), or a deed of expiation for certain felonies (unintentional homicide: iv, 92, where "a believing slave" is specified; perjury: v, 89; Iviii, 3);
Tradition delights in asserting that the slave's lot was among the latest preoccupations of the Prophet. It has quite a large store of sayings and anecdotes, attributed to the Prophet or to his Companions, enjoining real kindness towards this inferior social class.
the schools object to putting a free man to death for killing a slave, with the noteworthy exception of the Hanafis (and also of that illustrious, albeit somewhat dissident, Hanbali, Ibn Taymiyya [...]), and even they exempt the man who kills his own slave or one belonging to his son
[Paraphrasing B. R. Ambedkar]: "The fact that the word Dāsa later came to mean a slave may not by itself indicate such a status of the original people, for a form of the word "Aryan" also means a slave.
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