«وَآتُوا الْيَتَامَى أَمْوَالَهُمْ»
And give the orphans their property.
The setting for handing over property includes reaching maturity and appropriate competence. In that situation, those formerly described as orphans are addressed by a designation belonging to their earlier state.
This rhetorical point does not mean that the passage overrides the separate legal conditions governing delivery of property. The particular relation here is naming someone by a previous condition.