مُسْنَدُ أَحْمَدَ
Musnad Ahmad 3898
Musnad of Abdullah bin Mas'ood
It was narrated that 'Abdullah bin Mas'ood (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: "Paradise is closer to one of you than the strap of his sandal, and Hell is likewise."
Musnad Ahmad 3923A saheeh hadeeth, al-Bukhari (6488)]