Surah Al-Baqarah 2:220 البقرة

Allah has established these rules so that you may think about what benefits you in this world and the Afterlife. Your Companions ask you, O Prophet, about the guardianship of orphans and how they should deal with them: whether they can incorporate their wealth with orphans for expenses, food, and accommodation. Say in reply to them: If you are kind to them by arranging their affairs without taking anything in return and without touching their wealth, it is better in the sight of Allah and carries greater reward, better, and safer for their wealth. However, there is no harm if you combine their wealth with yours for living expenses, as they are your brothers in faith, and it is customary for brothers to help and look after the affairs of one another. Allah knows the guardian who, by combining the wealth of orphans with his, means harm and the one who means well. If He wished to make it difficult for you concerning orphans, He would have done so. Instead, He has made it easy for you to deal with them, as the sacred law is based on ease. Allah is Mighty, and nothing can overpower Him. He is Wise in His planning and legislation.