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:6:33 –

We know that you, ˹O Muhammad˺, are saddened by what they say. And indeed, they do not call you untruthful, but it is the verses of Allah that the wrongdoers reject.  

We know indeed (qad is a confirmative particle) that it grieves you that, matter, which they say, to you, in denial; yet it is not that they deny you, in secret, for they know that you are truthful (a variant reading ˹for lā yukadhdhibūnaka, ‘not ˹that˺ they deny you’˺ has lā yukdhibūnak, that is to say, ‘they do not associate you with mendacity’) but evildoers (al-zālimīn replaces the previous pronominalisation ˹‘they’˺) knowingly reject, deny, the signs of God, the Qur’ān.
القرآن:٦:٣٣ –

قَدْ نَعْلَمُ إِنَّهُ لَيَحْزُنُكَ الَّذِي يَقُولُونَ ۖ فَإِنَّهُمْ لَا يُكَذِّبُونَكَ وَلَٰكِنَّ الظَّالِمِينَ بِآيَاتِ اللَّهِ يَجْحَدُونَ  

{قد} للتحقيق {نعلم إنه} أي الشأن {ليحزنك الذي يقولون} لك من التكذيب {فإنهم لا يكذِّبونك} في السر لعلمهم أنك صادق وفي قراءة بالتخفيف أي لا ينسبونك إلى الكذب {ولكن الظالمين} وضعه موضع المضمر {يآيات الله} القرآن {يجحدون} يكذبون.