It is stated that when the Prophet (sws) was flown to the skies from the bayt al-maqdas; he was shown some scenes which will take place on the Day of Judgement. Is this so? Because punishments for a lot of sins have been mentioned in the Ahādith which depict this event. As I understand, these punishments are to be administered on that Day; howcome the Prophet (sws) saw them?

According to the Qur'ān, the incident of mi`rāj (ascension) of the Prophet (sws) was not a physical journey. It was more of a spiritual journey and took place in a vision shown to him. The Qur’ān says:

And the vision which We showed you [O Prophet!], We made it a trial for men. (17:60)

Dreams and visions, it should be borne in mind have remained a mode of revelation for the Prophets of Allah. Through them, they are imparted information by the Almighty in a symbolic form for the guidance of the Ummah.

In this particular vision, the Prophet (sws) was shown the various sections of Hell and the various forms of punishments being administered to its dwellers. These sights of Hell are enshrouded in the veil of symbolism and must not be taken literally. As such, the vision only symbolizes a future event.

 Of course! people will enter Heaven or Hell on the Day of Judgement after their deeds have been judged.