Surah Al-Baqarah 2:283

۞ وَإِن كُنتُمْ عَلَىٰ سَفَرٍ وَلَمْ تَجِدُوا۟ كَاتِبًا فَرِهَـٰنٌ مَّقْبُوضَةٌ ۖ فَإِنْ أَمِنَ بَعْضُكُم بَعْضًا فَلْيُؤَدِّ ٱلَّذِى ٱؤْتُمِنَ أَمَـٰنَتَهُۥ وَلْيَتَّقِ ٱللَّهَ رَبَّهُۥ ۗ وَلَا تَكْتُمُوا۟ ٱلشَّهَـٰدَةَ ۚ وَمَن يَكْتُمْهَا فَإِنَّهُۥٓ ءَاثِمٌ قَلْبُهُۥ ۗ وَٱللَّهُ بِمَا تَعْمَلُونَ عَلِيمٌ

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.

Translation: Saheeh International

Tafsir

And if you are upon a journey travelling and you contract a debt and you do not find a writer then a pledge ruhun or rihān plural of rahn in hand as a guarantee for you. The Sunna clarifies the permissibility of making pledges in towns where writers may be forthcoming; …

Excerpt from Tafsir al-Jalalayn, commentary on 2:283, via Quran.com. The reader has the full commentary and 9 more tafsirs.