Abu Hurayrah (may Allah be pleased with him) informs that his beloved friend and companion (may Allah's peace and blessings be upon him) advised and entrusted him with three things: First: Fasting three days of every month. Second: Performing the two Rak‘ahs (unit of prayer) of Duha (forenoon prayer) daily. Third: Performing Witr before sleeping for whoever fears not waking up at the end of the night.