Burayda bin al-Husayb · The Book of Oaths and Vows

"When Allah created Paradise and Hell, He sent Jibril, peace be upon him, to Paradise and said: 'Look at it and at what I have prepared for its people in it.' He looked at it, then he came back and said: 'By Your Glory, no one will hear of it but he will enter it.' So He commanded that it be surrounded by hardships and said: 'Go and look at it and at what I have prepared for its people…