It is narrated from Hazrat Abu Huraira (may Allah be pleased with him) that the Noble Prophet (peace and blessings be upon him) advised three things which I never leave whether at home or on a journey: (1) to perform Witr prayer before sleeping, (2) to fast three days in every month, (3) to offer two units of Duha (forenoon) prayer. Later, Hasan became doubtful and began to mention instead... the Friday bath (ghusl jumu'ah).