It is narrated from Sayyiduna Abu Dharr (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said to me: "Visit the graves, for by that the Hereafter is remembered; and wash the dead, for handling a lifeless body is a profound admonition; and offer the funeral prayers, perhaps that will make you sorrowful, for the sorrowful person is in the shade of Allah and seeks every good." All the narrators of this hadith are trustworthy!