Sura al-Baqara 2:282

يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِذَا تَدَايَنتُم بِدَيْنٍ إِلَىٰٓ أَجَلٍ مُّسَمًّى فَٱكْتُبُوهُ وَلْيَكْتُب بَّيْنَكُمْ كَاتِبٌۢ بِٱلْعَدْلِ وَلَا يَأْبَ كَاتِبٌ أَن يَكْتُبَ كَمَا عَلَّمَهُ ٱللَّـهُ فَلْيَكْتُبْ وَلْيُمْلِلِ ٱلَّذِى عَلَيْهِ ٱلْحَقُّ وَلْيَتَّقِ ٱللَّـهَ رَبَّهُۥ وَلَا يَبْخَسْ مِنْهُ شَيْـًٔا فَإِن كَانَ ٱلَّذِى عَلَيْهِ ٱلْحَقُّ سَفِيهًا أَوْ ضَعِيفًا أَوْ لَا يَسْتَطِيعُ أَن يُمِلَّ هُوَ فَلْيُمْلِلْ وَلِيُّهُۥ بِٱلْعَدْلِ وَٱسْتَشْهِدُوا۟ شَهِيدَيْنِ مِن رِّجَالِكُمْ فَإِن لَّمْ يَكُونَا رَجُلَيْنِ فَرَجُلٌ وَٱمْرَأَتَانِ مِمَّن تَرْضَوْنَ مِنَ ٱلشُّهَدَآءِ أَن تَضِلَّ إِحْدَىٰهُمَا فَتُذَكِّرَ إِحْدَىٰهُمَا ٱلْأُخْرَىٰ وَلَا يَأْبَ ٱلشُّهَدَآءُ إِذَا مَا دُعُوا۟ وَلَا تَسْـَٔمُوٓا۟ أَن تَكْتُبُوهُ صَغِيرًا أَوْ كَبِيرًا إِلَىٰٓ أَجَلِهِۦ ذَٰلِكُمْ أَقْسَطُ عِندَ ٱللَّـهِ وَأَقْوَمُ لِلشَّهَٰدَةِ وَأَدْنَىٰٓ أَلَّا تَرْتَابُوٓا۟ إِلَّآ أَن تَكُونَ تِجَٰرَةً حَاضِرَةً تُدِيرُونَهَا بَيْنَكُمْ فَلَيْسَ عَلَيْكُمْ جُنَاحٌ أَلَّا تَكْتُبُوهَا وَأَشْهِدُوٓا۟ إِذَا تَبَايَعْتُمْ وَلَا يُضَآرَّ كَاتِبٌ وَلَا شَهِيدٌ وَإِن تَفْعَلُوا۟ فَإِنَّهُۥ فُسُوقٌۢ بِكُمْ وَٱتَّقُوا۟ ٱللَّـهَ وَيُعَلِّمُكُمُ ٱللَّـهُ وَٱللَّـهُ بِكُلِّ شَىْءٍ عَلِيمٌ

yā-ayyuhā lladhīna āmanū idhā tadāyantum bi-daynin ila ajalin musamman fa-uktubūhu wa-l-yaktub baynakum kātibun bil-ʿadli wa-lā yaʾba kātibun an yaktuba ka-mā ʿallamahu allāhu fa-l-yaktub wa-l-yumlili alladhī ʿalayhi l-ḥaqqu wa-l-yattaqi allāha rabbahu wa-lā yabkhas minhu shayʾan fa-in kāna alladhī ʿalayhi l-ḥaqqu safīhan aw ḍaʿīfan aw lā yastaṭīʿu an yumilla huwa fa-lyumlil walīyuhu bil-ʿadli wa-istashhidū shahīdayni min rijālikum fa-in lam yakūnā rajulayni fa-rajulun wa-amraʾatāni mimman tarḍawna mina l-shuhadāʾi an taḍilla iḥdāhumā fa-tudhakkira iḥdāhumā l-ukhrā wa-lā yaʾba l-suhadāʾu idhā mā duʿū wa-lā tasʾamū an taktubūhu ṣaghīran aw kabīran ila ajalihi dhālikum aqsaṭu ʿinda allāhi wa-aqwamu lil-shahādati wa-adna allā tartābū illā an takūna tijāratan ḥāḍiratan tudīrūnahā baynakum fa-laysa ʿalaykum junāḥun allā taktubūhā wa-ashhidū idhā tabāyaʿtum wa-lā yuḍārra kātibun wa-lā shahīdun wa-in tafʿalū fa-innahu fusūqun bikum wa-ittaqū allāha wayuʿallimukumu allāhu wallāhu bi-kulli shayʾin ʿalīmun

O ye who believe! When ye deal with each other, in transactions involving future obligations in a fixed period of time, reduce them to writing Let a scribe write down faithfully as between the parties: let not the scribe refuse to write: as Allah Has taught him, so let him write. Let him who incurs the liability dictate, but let him fear His Lord Allah, and not diminish aught of what he owes. If the party liable is mentally deficient, or weak, or unable Himself to dictate, Let his guardian dictate faithfully, and get two witnesses, out of your own men, and if there are not two men, then a man and two women, such as ye choose, for witnesses, so that if one of them errs, the other can remind her. The witnesses should not refuse when they are called on (For evidence). Disdain not to reduce to writing (your contract) for a future period, whether it be small or big: it is juster in the sight of Allah, More suitable as evidence, and more convenient to prevent doubts among yourselves but if it be a transaction which ye carry out on the spot among yourselves, there is no blame on you if ye reduce it not to writing. But take witness whenever ye make a commercial contract; and let neither scribe nor witness suffer harm. If ye do (such harm), it would be wickedness in you. So fear Allah; For it is Allah that teaches you. And Allah is well acquainted with all things.