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:3:63 –

But if they turn away, then indeed - Allah is Knowing of the corrupters.  

And if they turn their backs, rejecting faith, assuredly God knows the agents of corruption, and will requite them (here the ˹third person˺ pronominalisation has been replaced with the overt noun ˹al-mufsidūn, ‘the agents of corruption’˺).
القرآن:٣:٦٣ –

فَإِنْ تَوَلَّوْا فَإِنَّ اللَّهَ عَلِيمٌ بِالْمُفْسِدِينَ  

{فإن تولَّوا} أعرضوا عن الإيمان {فإن الله عليم بالمفسدين} فيجازيهم وفيه وضع الظاهر موضع المضمر.

See similar narrations below:

Collected by Qurʾān
quran:16:82 –

But if they turn away, ˹O Muhammad˺ - then only upon you is ˹responsibility for˺ clear notification.  

But if they turn away, ˹if˺ they reject Islam, your duty, O Muhammad (s), is only to convey ˹the Message˺ plainly — this was ˹revealed˺ before the command to fight ˹the disbelievers˺.
القرآن:١٦:٨٢ –

فَإِنْ تَوَلَّوْا فَإِنَّمَا عَلَيْكَ الْبَلَاغُ الْمُبِينُ  

{فإن تولوْا} أعرضوا عن الإسلام {فإنما عليك} يا محمد {البلاغ المبين} الإبلاغ البيِّن وهذا قبل الأمر بالقتال.