Abayah bin Rifa'ah narrates from Husayn bin Ali (may Allah be pleased with him) that a man came to the Prophet (peace and blessings be upon him) and said: I am a coward and I am weak. He (peace and blessings be upon him) said: "Come to a jihad in which there is no danger: Hajj."
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 2897