It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him), he says: I asked, "O Messenger of Allah! Which deed is the best?" He (peace and blessings be upon him) said: "To have faith in Allah and to strive in His path." I said: "Which slave is best to set free?" He (peace and blessings be upon him) said: "The one who is most excellent and most valuable in the eyes of his owners." I said: "If I am not able to do that?" He (peace and blessings be upon him) replied: "Then help someone who is skilled, or do some work for someone who is unskilled." I said: "If I am unable to do even that?" He (peace and blessings be upon him) said: "Then keep people safe from your evil; this too will be a charity from you for yourself."