Narrated Abdullaah (radiyallaahu-anhu): ”The Prophet (sallal-laahu-alayhi-wasallam) said: Paradise is nearer to any of you than the Shiraak (leather strap) of his shoe, and so is the (Hell) fire.” [1]

Imaam Abdul-Azeez Bin Baaz (rahimahullaah) said: This (i.e. the above speech of the Prophet) is from Jawaami Al-kalim (i.e. a short expression with a vast meaning).  There is nothing between him (i.e. a person) and paradise except dying (in a state) of Imaan and (that can be within) a few moments.  And there is nothing between him and the hell fire except dying (in a state) of disbelief and (that can be within) a few moments. [2]

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[1]Saheeh Al-Bukhaari Vol 8. Hadeeth Number: 6488]

[2][ Al-Hulalul Ibreeziyyah Min At-Taliqaat Al-Baaziyyah Alaa Saheeh al-Bukhaari. Vol 4. Page: 238. Footnote 3]