Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:33:61 –

Accursed wherever they are found, ˹being˺ seized and massacred completely.  

Accursed, banished from mercy, ˹shall they be˺, wherever they are found they shall be seized and slain violently, that is to say, that is the ruling concerning them — meant as a command ˹for the Prophet˺.
القرآن:٣٣:٦١ –

مَلْعُونِينَ ۖ أَيْنَمَا ثُقِفُوا أُخِذُوا وَقُتِّلُوا تَقْتِيلًا  

{ملعونين} مبعدين عن الرحمة {أينما ثقفوا} وجدوا {أخذوا وقتِّلوا تقتيلا} أي الحكم فيهم هذا على جهة الأمر به.