Hadith 4:86
Buraida reported God’s messenger as saying, “The believer dies with the sweat on his brow.” Tirmidhi, Nasa'i and Ibn Majah transmitted it.
وَعَنْ بُرَيْدَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الْمُؤْمِنُ يَمُوتُ بِعَرَقِ الْجَبِينِ» . رَوَاهُ التِّرْمِذِيّ وَالنَّسَائِيّ وَابْن مَاجَه
Original Reference: Mishkat al-Masabih 1610