A man asked Sayyiduna Ibn Amr (may Allah be pleased with him) that he had an orphaned nephew under his care, to whom he had given a slave woman in charity. Now the nephew has died and he himself is the heir. He (Ibn Amr) replied: "I will tell you what I heard myself from the Prophet (peace and blessings be upon him). Once Sayyiduna Umar (may Allah be pleased with him) gave a horse in the way of Allah for riding. After a short while, he saw that the man was selling it standing. Sayyiduna Umar (may Allah be pleased with him) intended to buy it, so he consulted the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) forbade him from doing so and said: 'When you give something in charity, then keep that charity intact.'"