Amr bin Shu'aib narrates from his father, from his grandfather: A long period passed in which we did not perform any prayer except the five obligatory prayers. Then the Prophet Muhammad (peace be upon him) commanded us, so we gathered together. After praising and glorifying Allah, the Prophet (peace be upon him) said: "Indeed, Allah the Exalted has granted you another prayer." Then the Prophet (peace be upon him) encouraged us to perform Witr. The narrator of this narration (i.e., Ubaidullah), Muhammad bin Ubaidullah, is extremely weak.