Buy slaves and set them free with kindness & generosity; give them their right which is their walee'ship after setting them free from slavery .

This hadith is about the concept of manumission in Islam. It was narrated by 'Aisha that she intended to buy Barirah, a slave girl. Her masters stipulated that they would have her Wala'. When 'Aisha mentioned this to the Prophet Muhammad (PBUH), he said "Buy her, for the Wala' is for the one who manumits". This hadith teaches us that when someone buys and sets free a slave girl or any other type of slave, then they are entitled to their Wala'. In other words, it is their right and responsibility as well as an act of kindness towards them. This hadith also teaches us about justice and fairness in Islam; it encourages people to be kind and generous towards those who are less fortunate than them.