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:43:89 –

So turn aside from them and say, "Peace." But they are going to know.  

God, exalted be He, says: Then disregard them, leave ˹them˺ be, and say, ‘Peace!’, ˹I will stay away˺ from you — this was ˹revealed˺ before he was commanded to fight them. For they will ˹soon˺ come to know (ya‘lamūna, may also be read as ˹second person plural˺ ta‘lamūna, ‘you will ˹come to˺ know’), ˹meant˺ to threaten them. Meccan, except for verse 15; it consists of 56, 57 or 59 verses.
القرآن:٤٣:٨٩ –

فَاصْفَحْ عَنْهُمْ وَقُلْ سَلَامٌ ۚ فَسَوْفَ يَعْلَمُونَ  

قال تعالى: {فاصفح} أعرض {عنهم وقل سلام} منكم وهذا قبل أن يؤمر بقتالهم {فسوف يعلمون} بالياء والتاء تهديد لهم.