It was narrated form Abu Hurairah that the Prophet said: "When the month of Ramadan beings, the gates of Paradise are opened. The gates of the Fire are closed and the devils are chained up." (Sahih) Abu 'Abdur-Rahman (An-Nasai) said: This meaning, the narration of Ibn Ishaq - is a mistake. Ibn Ishaq did not hear from Az-Zuhri. What is correct is what we mentioned it previously.