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:71:27 –

Indeed, if You leave them, they will mislead Your servants and not beget except ˹every˺ wicked one and ˹confirmed˺ disbeliever.  

Assuredly if You leave them, they will lead Your servants astray, and will beget only disbelieving profligates (fājir and kaffār derive ˹respectively˺ from yafjuru and yakfuru): he said this on account of the mentioned revelation that had been given to him.
القرآن:٧١:٢٧ –

إِنَّكَ إِنْ تَذَرْهُمْ يُضِلُّوا عِبَادَكَ وَلَا يَلِدُوا إِلَّا فَاجِرًا كَفَّارًا  

{إنك إن تذرهم يُضلوا عبادك ولا يلدوا إلا فاجرا كفارا} من يفجر ويكفر، قال ذلك لما تقدم من الإيحاء إليه.