Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:17:35 –

And give full measure when you measure, and weigh with an even balance. That is the best ˹way˺ and best in result.  

And give full measure, complete it, when you measure, and weigh with a right balance, ˹with˺ an even balance: that is better and fairer in return.
القرآن:١٧:٣٥ –

وَأَوْفُوا الْكَيْلَ إِذَا كِلْتُمْ وَزِنُوا بِالْقِسْطَاسِ الْمُسْتَقِيمِ ۚ ذَٰلِكَ خَيْرٌ وَأَحْسَنُ تَأْوِيلًا  

{وأوْفوا الكيل} أتموه {إذا كلتم وزنوا بالقسطاس المستقيم} الميزان السوي {ذلك خير وأحسن تأويلاً} مآلاً.