Wa in kuntum 'alaa safarinw wa lam tajidoo kaatiban farihaanum maqboodatun fa in amina ba'dukum ba'dan falyu'addil lazi tumina amaa natahoo walyattaqil laaha Rabbah; wa laa taktumush shahaadah; wa mai yaktumhaa fa innahooo aasimun qalbuh; wallaahu bimaa ta'maloona 'Aleem
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 Allah, his Lord. And do not conceal testimony, for whoever conceals it – his heart is indeed sinful, and Allah is Knowing of what you do.
1 Mufti Taqi Usmani
If you are on a journey, and find no scribe, then (you may have resort to holding something as) mortgage, taken into possession. However, if one of you trusts the other, then the one who has been trusted should fulfill his trust, and should fear Allah, his Lord. Do not conceal testimony. Whoever conceals it, his heart is surely, sinful. Allah is All-Aware of what you do.