Allah said,

﴿وَمَا مَلَكَتْ أَيْمَـنُكُمْ﴾

(and those (slaves) whom your right hands possess,) this is an order to be kind to them because they are weak, being held as captives by others. An authentic Hadith records that during the illness that preceded his death, the Messenger of Allah continued advising his Ummah:

«الصَّلَاةَ الصَّلَاةَ، وَمَا مَلَكَتْ أَيْمَانُكُم»

((Protect) the prayer, (protect) the prayer, and (those slaves) whom your hands possess.) He was repeating it until his tongue was still. Imam Ahmad recorded that Al-Miqdam bin Ma`dykarib said that the Messenger of Allah said,

«مَا أَطْعَمْتَ نَفْسَكَ فَهُوَ لَكَ صَدَقَةٌ، وَمَا أَطْعَمْتَ وَلَدَكَ فَهُوَ لَكَ صَدَقَةٌ، وَمَا أَطْعَمْتَ زَوْجَتَكَ فَهُوَ لَكَ صَدَقَةٌ، وَمَا أَطْعَمْتَ خَادِمَكَ فَهُوَ لَكَ صَدَقَة»

(What you feed yourself is a Sadaqah (charity) for you, what you feed your children is Sadaqah for you, what you feed your wife is Sadaqah for you and what you feed your servant is Sadaqah for you.) An-Nasa'i recorded this Hadith which has an authentic chain of narration, all the thanks are due to Allah. `Abdullah bin `Amr said to a caretaker of his, "Did you give the slaves their food yet'' He said, "No.'' Ibn `Amr said, "Go and give it to them, for the Messenger of Allah said,

«كَفَى بِالْمَرْءِ إِثْمًا أَنْ يَحْبِسَ عَمَّنْ يَمْلِكُ قُوتَهُم»

(It is enough sin for someone to prevent whomever he is responsible for from getting their food. )'' Muslim recorded this Hadith. Abu Hurayrah narrated that the Prophet said,

«لِلْمَمْلُوكِ طَعَامُهُ وَكِسْوَتُهُ، وَلَا يُكَلَّفُ مِنَ الْعَمَلِ إِلَّا مَا يُطِيق»

(The slave has the right to have food, clothing and to only be required to perform what he can bear of work.) Muslim also recorded this Hadith. Abu Hurayrah narrated that the Prophet said,

«إِذَا أَتَى أَحَدَكُمْ خَادِمُهُ بِطَعَامِه، فَإِنْ لَمْ يُجْلِسْهُ مَعَهُ فَلْيُنَاوِلْهُ لُقْمَةً أَوْ لُقْمَتَيْنِ أَوْ أُكْلَةً أَوْ أُكْلتَيْنِ فَإِنَّهُ وَلِيَ حَرَّهُ وَعِلَاجَه»

(When your servant brings meals to one of you, if he does not let him sit and share the meal, then he should at least give him a mouthful or two mouthfuls of that meal or a meal or two, for he has prepared it.) This is the wording collected by Al-Bukhari.