Give away whatever you can for Allah's sake without expecting anything in return

This hadith speaks about the importance of charity and giving. Umar bin Al-Khattab gave a horse in charity and later saw it being sold in the market. He wanted to buy it back, but he asked for permission from the Prophet ﷺ first. The Prophet said that he should not take back what he had given in charity, so Ibn 'Umar never purchased things which he had given away before. This teaches us that we should be generous with our wealth and give away whatever we can for Allah's sake without expecting anything in return. We should also remember that once something is given away, we shouldn't try to get it back again as this goes against the teachings of Islam.