"The Prophet (saw) said, The one who cares for an orphan and myself will be together in Paradise like this, and he (saw) held his two fingers together to illustrate."
[Sahih Bukhari]
"The Prophet (saw) said, "The best house among the Muslims is the house in which orphans are well-treated. The worst house among the Muslims is the house in which orphans are ill-treated"
[Sahih Bukhari]
"The Prophet (saw) said, "Blessed is the wealth of the Muslim, from which he gives to the poor, the orphan and the wayfarer"
[Sahih Muslim]
Because you transformed an orphan’s life and helped them fulfil their potential, you will gain the reward for their actions as well. The extent of these rewards is immeasurable.
"The Prophet Muhammad (peace be upon him) said, "The one who looks after an orphan will be in Paradise, and if he put hands on his head, Allah will give him a reward for each hair."