Sunan an-Nasa'i, Hadith 1823 ⓘ
Qais said: "I entered upon Khabbab when he had been cauterized on his stomach seven times. He said: 'Were it not that the Messenger of Allah forbade us to pray for death, I would have prayed for it."'
أَخْبَرَنَا مُحَمَّدُ بْنُ بَشَّارٍ، قَالَ حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ، قَالَ حَدَّثَنِي قَيْسٌ، قَالَ دَخَلْتُ عَلَى خَبَّابٍ وَقَدِ اكْتَوَى فِي بَطْنِهِ سَبْعًا وَقَالَ لَوْلاَ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم نَهَانَا أَنْ نَدْعُوَ بِالْمَوْتِ دَعَوْتُ بِهِ .
also referenced under: Book 21, Hadith 6 (In-Book) & Volume 3, Book 21, Hadith 1824 (DarusSalam)