One of the first things Google’s spat back at me. Just search for Muhammad’s night Journey or something like that.
Ahhh…Imam Google! Now I understand
‘Glory to Him who made His servant travel by night from the sacred place of worship to the furthest place of worship, whose surroundings We have blessed, to show him some of Our signs: He alone is the All Hearing, the All Seeing.’ (‘Al-Isra’: 1).
Al-Isra means ‘The Night Journey’, and this all the Qu’ran has to say about it. No ladder!
Shaykh Seyyed Hossein Nasr writes:
‘Detailed accounts of the Night Journey exist in the Ḥadīth, and the event resonates throughout Islamic literature, especially in mystical works, where the journey is seen as the prototype for all spiritual journeying toward the encounter with God. This central spiritual event in the life of the Prophet has also been the subject of some of the greatest masterpieces of Islamic miniature painting and poetry. Elements of the account of the Prophet’s Night Journey may have even influenced accounts of mystical journeying in other traditions, such as Dante’s Divine Comedy, whose architecture of the heavens is similar to that described in accounts of the Prophet’s ascension, some of which had reached the Latin West.’ (‘The Study Qur’an’).
He doesn’t mention ladders either.
Although no means a Qur’anist, some ʼaḥādīth I would be
very wary off! Thank you for your trouble.
Take care, and very best regards.