Harun bin Ishaq bin Muhammad هارون بن إسحاق بن محمد بن مالك · The Book of Fasting

"The Messenger of Allah used to fast until we said: 'He will not fast.' And he used to fast Shaban, or most of Shaban."' '

"For those who fast there is a gate in Paradise called Ar-Rayyan, through which no one but they will enter. When the last of them has entered it, it will be closed. Whoever enters through it will drink, and whoever drinks will never thirst again."