Salim bin 'Abdullah narrated from his father that the Messenger of Allah (s.a.w) said:
"The breadth of the gate through which my Ummah shall enter Paradise is the distance that a good rider covers in three. (meaning three nights or three years and, and that [the latter] is more obvious) Despite that, they shall be constrained by it until their shoulders are almost crushed completely." (PT)
English reference (PT): Vol. 4, Book 12, Hadith 2548 (PT)
Arabic reference (PT): Book 38, Hadith 2745 (PT)