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:41:23 –

And that was your assumption which you assumed about your Lord. It has brought you to ruin, and you have become among the losers."  

And that (wa-dhālikum, the subject) supposition of yours (zannukum, substitutes for it) which you supposed of your Lord (alladhī zanantum bi-rabbikum, a descriptive clause; the predicate ˹is the following, ardākum˺) has ruined you, that is, it has brought about your destruction. So you have become among the losers’.
القرآن:٤١:٢٣ –

وَذَٰلِكُمْ ظَنُّكُمُ الَّذِي ظَنَنْتُمْ بِرَبِّكُمْ أَرْدَاكُمْ فَأَصْبَحْتُمْ مِنَ الْخَاسِرِينَ  

{وذلكم} مبتدأ {ظنكم} بدل منه {الذي ظننتم بربكم} نعت والخبر {أرداكم} أي أهلككم {فأصبحتم من الخاسرين}.