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:33:68 –

Our Lord, give them double the punishment and curse them with a great curse."  

Our Lord, give them a double chastisement, in other words, twice the like of our chastisement, and curse them, chastise them, with numerous curses!’, with the equivalent number ˹of chastisements˺ (la‘nan kathīran, ‘numerous curses’, is also read la‘nan kabīran, ˹which means˺ ‘with a mighty curse’).
القرآن:٣٣:٦٨ –

رَبَّنَا آتِهِمْ ضِعْفَيْنِ مِنَ الْعَذَابِ وَالْعَنْهُمْ لَعْنًا كَبِيرًا  

{ربنا آتهم ضعفين من العذاب} أي مثليْ عذابنا {والعنهم} عذبهم {لعنا كثيرا} عدده، وفي قراءة بالموحدة، أي عظيماً.