Similar to the ‘eye of the needle’ and the camel.
It had nothing to do with an actual needle.
A Great Example of that Idiomatic ..... well.... idiom
Too often the Bible is given a “wooden” literal” “translation”..
I can not remember where the scripture about telling that mountain to move” is located but its not a physical mountain that being referred to as far as O know. were told that if we have sufficient faith that the mountain SHALL move...and as far as I know....there havent been any reported mountain movements...physical mountains at any rate.