What he saw was indeed beyond human comprehension; he saw some of 53:18 Tafsir_English translation

﴿لَقَدۡ رَأَىٰ مِنۡ ءَايَٰتِ رَبِّهِ ٱلۡكُبۡرَىٰٓ ﴾
[النَّجم: 18]

What he saw was indeed beyond human comprehension; he saw some of his Creator's wonders and signs serving to demonstrate Divine power and omnipotence

ترجمة: لقد رأى من آيات ربه الكبرى, باللغة الإنجليزية تفسير

﴿لقد رأى من آيات ربه الكبرى﴾ [النَّجم: 18]