‘Abdullaah ibn Mas’ood radiallaahu ‘anhu said:
The Prophet sallallaahu ‘alayhi wa sallam drew a line for us and said. “This is Allaah’s Straight Path.” Then he drew lines to its right and left and then said. “These ore other paths. Upon every one of them there is a devil calling towards it.”
Then he recited: “Indeed this is My Straight Path, so follow it, and do not follow other paths that will separate you from His Path.” [Soorah al-An’aam 6:153].” 
 Hasan: Related by Ahmad (1/435) and an-Nasaa’ee (7/49), from Ibn Mas’ood radiallaahu ‘anhu. It was authenticated by al-Albaanee in Dhilaalul-Jannah fee Takhreejis-Sunnah (no.16).
The Following is taken from Tafseer Ibn Kathir of the verse : Soorah al-An’aam 6:153
Imam Ahmad recorded that, An-Nawwas bin Sam`an said that the Messenger of Allah said,
(Allah has given a parable of the straight path, and on the two sides of this path, there are two walls containing door ways. On these door ways, there are curtains that are lowered down. on the gate of this path there is a caller heralding, `O people! come and enter the straight path all together and do not divide. ‘ There is also another caller that heralds from above the path, who says when a person wants to remove the curtain on any of these doors, `Woe to you! Do not open this door, for if you open it, you will enter it. The (straight) path is Islam, the two walls are Allah’s set limits, the open doors lead to Allah’s prohibitions, the caller on the gate of the path is Allah’s Book (the Qur’an), while the caller from above the path is Allah’s admonition in the heart of every Muslim.)
At-Tirmidhi and An-Nasa’i also recorded this Hadith, and At-Tirmidhi said, “Hasan Gharib.”