Surah Al-Baqarah, Verse 283

۞ وَإِن كُنتُمۡ عَلَىٰ سَفَرٖ وَلَمۡ تَجِدُواْ كَاتِبٗا فَرِهَٰنٞ مَّقۡبُوضَةٞۖ فَإِنۡ أَمِنَ بَعۡضُكُم بَعۡضٗا فَلۡيُؤَدِّ ٱلَّذِي ٱؤۡتُمِنَ أَمَٰنَتَهُۥ وَلۡيَتَّقِ ٱللَّهَ رَبَّهُۥۗ وَلَا تَكۡتُمُواْ ٱلشَّهَٰدَةَۚ وَمَن يَكۡتُمۡهَا فَإِنَّهُۥٓ ءَاثِمٞ قَلۡبُهُۥۗ وَٱللَّهُ بِمَا تَعۡمَلُونَ عَلِيمٞ٢٨٣

wa-in kuntum ʿalā safarin walam tajidū kātiban farihānun maqbūḍatun fa-in amina baʿḍukum baʿḍan falyu-addi alladhī u'tumina amānatahu walyattaqi l-laha rabbahu walā taktumū l-shahādata waman yaktum'hā fa-innahu āthimun qalbuhu wal-lahu bimā taʿmalūna ʿalīmun

And if you are on a journey and cannot find a scribe, then a security deposit [should be] taken. And if one of you entrusts another, then let him who is entrusted discharge his trust [faithfully] and let him fear Allāh, his Lord. And do not conceal testimony, for whoever conceals it - his heart is indeed sinful, and Allāh is Knowing of what you do.