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:2:42 –

And do not mix the truth with falsehood or conceal the truth while you know ˹it˺.  

And do not obscure, confuse, the truth, that I have revealed to you, with falsehood, that you fabricate; and do not conceal the truth, the description of Muhammad (s), wittingly, that is, knowing it to be the truth.
القرآن:٢:٤٢ –

وَلَا تَلْبِسُوا الْحَقَّ بِالْبَاطِلِ وَتَكْتُمُوا الْحَقَّ وَأَنْتُمْ تَعْلَمُونَ  

{ولا تلبسوا} تخلطوا {الحق} الذي أنزلت عليكم {بالباطل} الذي تفترونه {و} لا {تكتموا الحق} نعت محمد {وأنتم تعلمون} أنه حق.

See similar narrations below:

Collected by Qurʾān
quran:3:71 –

O People of the Scripture, why do you confuse the truth with falsehood and conceal the truth while you know ˹it˺?  

O People of the Scripture! Why do you confound, ˹why do˺ you mix, truth with falsehood, by distorting and falsifying ˹scripture˺, and conceal the truth, the descriptions of the Prophet, while you know?, that it is the truth?
القرآن:٣:٧١ –

يَا أَهْلَ الْكِتَابِ لِمَ تَلْبِسُونَ الْحَقَّ بِالْبَاطِلِ وَتَكْتُمُونَ الْحَقَّ وَأَنْتُمْ تَعْلَمُونَ  

{يا أهل الكتاب لِمَ تلبسون} تخلطون {الحق بالباطل} بالتحريف والتزوير {وتكتمون الحق} أي نعت النبي {وأنتم تعلمون} أنه الحق.