Sunan an-Nasa'i, Hadith 1829 ⓘ
It was narrated from (Ibn Buraidah) that his father said: "I heard the Messenger of Allah say: 'The believer dies with sweat on his forehead."'
أَخْبَرَنَا مُحَمَّدُ بْنُ مَعْمَرٍ، قَالَ حَدَّثَنَا يُوسُفُ بْنُ يَعْقُوبَ، قَالَ حَدَّثَنَا كَهْمَسٌ، عَنِ ابْنِ بُرَيْدَةَ، عَنْ أَبِيهِ، قَالَ سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " الْمُؤْمِنُ يَمُوتُ بِعَرَقِ الْجَبِينِ " .
also referenced under: Book 21, Hadith 12 (In-Book) & Volume 3, Book 21, Hadith 1830 (DarusSalam)