Sayyiduna Abu Dharr (may Allah be pleased with him) narrates that my beloved Prophet (peace be upon him) advised me regarding three things, which I will never leave, insha’Allah. The Prophet (peace be upon him) advised me to perform the Duha (forenoon) prayer, to offer Witr before sleeping, and to fast three days every month. Imam Abu Bakr (may Allah have mercy on him) says that the hadith of Sayyiduna Abu Hurairah (may Allah be pleased with him), in which the Prophet (peace be upon him) advised him regarding three things, I have mentioned it in another place.