It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him), he says: I asked the Messenger of Allah (peace and blessings be upon him), "Which deed is the best?" He (peace and blessings be upon him) replied: "To have faith in Allah Almighty and to strive in His path." I said: "Which slave's emancipation is the best?" He (peace and blessings be upon him) said: "The one who is most valuable and expensive in the eyes of his owners." I said: "What if I am not able to do that?" He (peace and blessings be upon him) replied: "Then help someone in distress or do some work for a person who is unskilled." I said: "What if I am unable to do even that good deed?" 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."