(42) باب الْمِعْرَاجِ
Narrated Ibn `Abbas:
Regarding the Statement of Allah" "And We granted the vision (Ascension to the heavens) which We made you see (as an actual eye witness) was only made as a trial for the people." (17.60) Ibn `Abbas added: The sights which Allah's Messenger (ﷺ) was shown on the Night Journey when he was taken to Bait-ulMaqdis (i.e. Jerusalem) were actual sights, (not dreams). And the Cursed Tree (mentioned) in the Qur'an is the tree of Zaqqum (itself) .
Reference: Sahih al-Bukhari 3888
In-book reference: Book 63, Hadith 114
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 5, Book 58, Hadith 228