Surah An-Nisa, ayah 2

4:2

وَءَاتُواْ ٱلۡيَتَٰمَىٰٓ أَمۡوَٰلَهُمۡۖ وَلَا تَتَبَدَّلُواْ ٱلۡخَبِيثَ بِٱلطَّيِّبِۖ وَلَا تَأۡكُلُوٓاْ أَمۡوَٰلَهُمۡ إِلَىٰٓ أَمۡوَٰلِكُمۡۚ إِنَّهُۥ كَانَ حُوبٗا كَبِيرٗا ٢

Wa ātul-yatāmā amwālahum walā tatabaddalul-khabītha bit-tayyibi walā ta'kulū amwālahum ilā amwālikum innahū kāna hūban kabīrā

And give to the orphans their properties and do not substitute the defective [of your own] for the good [of theirs]. And do not consume their properties into your own. Indeed, that is ever a great sin.