17:35
وَأَوْفُوا۟ ٱلْكَيْلَ إِذَا كِلْتُمْ وَزِنُوا۟ بِٱلْقِسْطَاسِ ٱلْمُسْتَقِيمِ ۚ ذَٰلِكَ خَيْرٌۭ وَأَحْسَنُ تَأْوِيلًۭا
And give full measure when you measure, and weigh with an even balance. That is the best [way] and best in result.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The Command to handle the Orphan's Wealth properly and to be Honest in Weights and Measures
وَلاَ تَقْرَبُواْ مَالَ الْيَتِيمِ إِلاَّ بِالَّتِى هِىَ أَحْسَنُ حَتَّى يَبْلُغَ أَشُدَّهُ
(And come not near to the orphan's property except to improve it, until he attains the age of full strength.) meaning, do not dispose of the orphan's wealth except in a proper manner.
وَلاَ تَأْكُلُوهَآ إِسْرَافاً وَبِدَاراً أَن يَكْبَرُواْ وَمَن كَانَ غَنِيّاً فَلْيَسْتَعْفِفْ وَمَن كَانَ فَقِيراً فَلْيَأْكُلْ بِالْمَعْرُوفِ
(but consume it the orphan's property not wastefully and hastily fearing that they should grow up, and whoever (among guardians) is rich, he should take no wages, but if he is poor, let him have for himself what is just and reasonable (according to his labor).) 4:6 In Sahih Muslim it is recorded that the Messenger of Allah ﷺ said to Abu Dharr:
«يَا أَبَا ذَرَ إِنِّي أَرَاكَ ضَعِيفًا، وَإِنِّي أُحِبُّ لَكَ مَا أُحِبُّ لِنَفْسِي: لَا تَأَمَّرَنَّ عَلَى اثْنَيْنِ، وَلَا تَوَلَّيَنَّ مَالَ الْيَتِيم»