Sura al-Baqara 2:140

أَمْ تَقُولُونَ إِنَّ إِبْرَٰهِـۧمَ وَإِسْمَٰعِيلَ وَإِسْحَٰقَ وَيَعْقُوبَ وَٱلْأَسْبَاطَ كَانُوا۟ هُودًا أَوْ نَصَٰرَىٰ قُلْ ءَأَنتُمْ أَعْلَمُ أَمِ ٱللَّـهُ وَمَنْ أَظْلَمُ مِمَّن كَتَمَ شَهَٰدَةً عِندَهُۥ مِنَ ٱللَّـهِ وَمَا ٱللَّـهُ بِغَٰفِلٍ عَمَّا تَعْمَلُونَ

am taqūlūna inna ibrāhīma wa-ismāʿīla wa-isḥāqa wa-yaʿqūba wa-l-asbāṭa kānū hūdan aw naṣārā qul aʾantum aʿlamu ami allāhu wa-man aẓlamu mimman katama shahādatan ʿindahu mina allāhi wa-mā allāhu bi-ghāfilin ʿammā taʿmalūna

Or do ye say that Abraham, Isma'il Isaac, Jacob and the Tribes were Jews or Christians? Say: Do ye know better than Allah? Ah! who is more unjust than those who conceal the testimony they have from Allah? but Allah is not unmindful of what ye do!

Sura al-Baqara 2:283

وَإِن كُنتُمْ عَلَىٰ سَفَرٍ وَلَمْ تَجِدُوا۟ كَاتِبًا فَرِهَٰنٌ مَّقْبُوضَةٌ فَإِنْ أَمِنَ بَعْضُكُم بَعْضًا فَلْيُؤَدِّ ٱلَّذِى ٱؤْتُمِنَ أَمَٰنَتَهُۥ وَلْيَتَّقِ ٱللَّـهَ رَبَّهُۥ وَلَا تَكْتُمُوا۟ ٱلشَّهَٰدَةَ وَمَن يَكْتُمْهَا فَإِنَّهُۥٓ ءَاثِمٌ قَلْبُهُۥ وَٱللَّـهُ بِمَا تَعْمَلُونَ عَلِيمٌ

wa-in kuntum ʿalā safarin wa-lam tajidū kātiban farihānun maqbūḍatun fa-in amina baʿḍukum baʿḍan fa-l-yuʾaddi alladhī iʾtumina amānatahu wa-l-yattaqi allāha rabbahu wa-lā taktumū l-shahādata wa-man yaktumhā fainnahu āthimun qalbuhu wallāhu bi-mā taʿmalūna ʿalīmun

If ye are on a journey, and cannot find a scribe, a pledge with possession (may serve the purpose). And if one of you deposits a thing on trust with another, Let the trustee (Faithfully) discharge His trust, and let him fear his Lord. Conceal not evidence; for whoever conceals it,- His heart is tainted with sin. And Allah Knoweth all that ye do.

Sura al-Ghāfir 40:28

وَقَالَ رَجُلٌ مُّؤْمِنٌ مِّنْ ءَالِ فِرْعَوْنَ يَكْتُمُ إِيمَٰنَهُۥٓ أَتَقْتُلُونَ رَجُلًا أَن يَقُولَ رَبِّىَ ٱللَّـهُ وَقَدْ جَآءَكُم بِٱلْبَيِّنَٰتِ مِن رَّبِّكُمْ وَإِن يَكُ كَٰذِبًا فَعَلَيْهِ كَذِبُهُۥ وَإِن يَكُ صَادِقًا يُصِبْكُم بَعْضُ ٱلَّذِى يَعِدُكُمْ إِنَّ ٱللَّـهَ لَا يَهْدِى مَنْ هُوَ مُسْرِفٌ كَذَّابٌ

wa-qāla rajulun muʾminun min āli firʿawna yaktumu īmānahu ataqtulūna rajulan an yaqūla rabbiya allāhu wa-qad jāʾakum bil-bayyināti min rabbikum wa-in yaku kādhiban faʿalayhi kadhibuhu wa-in yaku ṣādiqan yuṣibkum baʿḍu alladhī yaʿidukum inna allāha lā yahdī man huwa musrifun kadhdhābun

A believer, a man from among the people of Pharaoh, who had concealed his faith, said: "Will ye slay a man because he says, 'My Lord is Allah'?- when he has indeed come to you with Clear (Signs) from your Lord? and if he be a liar, on him is (the sin of) his lie: but, if he is telling the Truth, then will fall on you something of the (calamity) of which he warns you: Truly Allah guides not one who transgresses and lies!