Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said concerning the verse of the Holy Qur'an, "And test the orphans until they reach (the age of) marriage; then if you perceive in them sound judgement, hand over to them their property" [Surah al-Nisa: 6]: In this verse Allah Almighty is saying: Test the orphan children at the time of puberty; if you find some good in them and find them sound in managing their own property, then return their property to them, and also take witnesses over it.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحجر / 11323