مُسْنَدُ أَحْمَدَ
Musnad Ahmad 4188
Musnad of Abdullah bin Mas'ood
It was narrated that `Abdullah said: The Messenger of Allah (ﷺ) said: “Verily Paradise is closer to one of you than the strap of his sandal, and Hell is likewise."
Musnad Ahmad 4216Its isnad is saheeh, al-Bukhari (6488)]