وَحَدَّثَنِي عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، قَالَ بَلَغَنِي أَنَّ سَعْدَ بْنَ زُرَارَةَ، اكْتَوَى فِي زَمَانِ رَسُولِ اللَّهِ صلى الله عليه وسلم مِنَ الذُّبَحَةِ فَمَاتَ ‏.‏

Yahya related to me from Malik that Yahya ibn Said said, "I heardthat Sad ibn Zurara cauterized himself because of a pain in the throataccompanied by blood and he died." Translation Not Available

Book Ref: Muwatta Imam Malik Book 50 Hadith 1726
Web Ref:  Muwatta Imam Malik Book 50 Hadith 13