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:76:31 –

He admits whom He wills into His mercy; but the wrongdoers - He has prepared for them a painful punishment.  

He admits whomever He will into His mercy, His Paradise, namely, the believers; and as for the evildoers (alzālimīna is in the accusative because of an implied verb, that is to say, a‘adda, ‘He has prepared’, as explained by ˹what follows˺), He has prepared for them a painful chastisement — these are the disbelievers. Meccan, consisting of 50 verses.
القرآن:٧٦:٣١ –

يُدْخِلُ مَنْ يَشَاءُ فِي رَحْمَتِهِ ۚ وَالظَّالِمِينَ أَعَدَّ لَهُمْ عَذَابًا أَلِيمًا  

{يُدخل من يشاء في رحمته} جنته وهم المؤمنون {والظالمين} ناصبه فعل مقدر، أي أعد يفسره {أَعد لهم عذابا أليما} مؤلماً وهم الكافرون.