Hadith 1890
Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates from the Noble Prophet (peace and blessings of Allah be upon him) that he (peace be upon him) said: "Fasting is a shield."
Hadith 1891
Hazrat Mutarrif narrates that I was present in the service of Sayyiduna Uthman bin Abi al-As (may Allah be pleased with him), so he called for milk to be brought for me to drink. I said, "I am fasting." He said: "Indeed, I heard the Messenger of Allah (peace and blessings be upon him) say that 'Fasting is a shield from Hell just as a shield is for any one of you in battle.'" And he said: "The best fasting is to fast three days in every month."