Umm Salama reported God's Messenger as spying, “When a slave of one of you women has made an agreement to purchase his freedom and can pay the full price, she must veil herself from him.”
‘Amr b. Shu'aib, on his father's authority, told that this grandfather reported the Prophet as saying, “A slave who has entered into an agreement to purchase his freedom is a slave as long as a dirham of the agreed price remains to be paid."
‘Amr b. Shu'aib, on his father’s authority, told that his grandfather reported God's Messenger as saying, “If anyone has agreed to let his slave buy his freedom for a hundred uqiyas and he pays them all but ten (or he said, ten dinars), and he is then unable to complete the amount, he remains a slave.”
I was a slave of Umm Salama, and she said, “I shall emancipate you, but I stipulate that you must serve God’s Messenger as long as you live” I replied, “Even if you do not make a stipulation with me I shall not leave God’s Messenger as long as I live”. She then emancipated me and made the stipulation with me.
