Sayyiduna Abu Dharr Ghifari (may Allah be pleased with him) narrated that I asked the Messenger of Allah (peace and blessings be upon him): "Which deed is the best?" He replied, "To have faith in Allah and to strive in His path." I asked, "And what kind of slave is best to set free?" He said, "The one who is the most valuable and most beloved in the eyes of his owner." I said, "What if I am unable to do that?" He replied, "Then help a Muslim craftsman or assist someone who is unskilled." He said, "What if I am unable to do even that?" Upon this, he said, "Then keep people safe from your evil, for this too is a charity which you do for yourself."