Sunan Ibn Majah, Book 5, Hadith 1305 (In-Book) ⓘ
It was narrated from Ibn Abu Rafi’, from his father, from his grandfather, that the Prophet killed a scorpion while he was praying.
حَدَّثَنَا مُحَمَّدُ بْنُ يَحْيَى، حَدَّثَنَا الْهَيْثَمُ بْنُ جَمِيلٍ، حَدَّثَنَا مَنْدَلٌ، عَنِ ابْنِ أَبِي رَافِعٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ النَّبِيَّ ـ صلى الله عليه وسلم ـ قَتَلَ عَقْرَبًا وَهُوَ فِي الصَّلاَةِ .
also referenced under: Hadith 1247 (Reference) & Volume 2, Book 5, Hadith 1247 (DarusSalam)