Abu Bakr al-Balkhi says:
“The month of Rajab is the month of cultivation of the land. The month of Chaabane is that of irrigation and the month of Ramadan is that of harvesting.”
He adds :
“The month of Rajab is like the wind and the month of Chaabane like the cloud and the month of Ramadan like the rain. He who does not plant or cultivate in Rajab and does not water in Chaabane, how could he harvest in Ramadan?”
During the month of Ramadan, the gates of Heaven are opened, the gates of Hell are closed and the demons are chained.
At-Tirmidhi, Ibn Maja and Ibn Khuzaïmah reported from the Prophet (Sallallahu ‘alayhi wa salam):
“From the first night of Ramadan, the demons and the most wicked of the jinns are chained, the gates of Hell are all closed and those of Paradise are all open. This will be called: “O seeker of good! Advance. O seeker of evil! Retreat.” And, every night, Allah frees people from Hell.“ [declared good by Al-Albani in Sahih al-Jami 759]