The story of Moosa A.S and Fir'awn.

 The story of Moosa A.S and Fir'awn. 

Alhamdulillah, Moosa a.s now has been in the house of firawn. 

Allah says in Quran, 

Ta Ha 20:40

[And We favored you] when your sister went and said, 'Shall I direct you to someone who will be responsible for him?' So We restored you to your mother that she might be content and not grieve. And you killed someone,[1] but We saved you from retaliation and tried you with a [severe] trial. And you remained [some] years among the people of Madyan. Then you came [here] at the decreed time, O Moses.

One of the great favours Allah did to Mosa A.S was to restore him back to his mother to care for him

And apart from that, the house of Fir'awn also used to pay her. 

Allah says, 

Al-Qasas 28:7

And We inspired to the mother of Moses, "Suckle him; but when you fear for him, cast him into the river and do not fear and do not grieve. Indeed, We will return him to you and will make him [one] of the messengers."

Al-Qasas 28:8

And the family of Pharaoh picked him up [out of the river] so that he would become to them an enemy and a [cause of] grief. Indeed, Pharaoh and Hāmān and their soldiers were deliberate sinners.

Al-Qasas 28:9

And the wife of Pharaoh said, "[He will be] a comfort of the eye [i.e., pleasure] for me and for you. Do not kill him; perhaps he may benefit us, or we may adopt him as a son." And they perceived not.[1]

Al-Qasas 28:10

And the heart of Moses' mother became empty [of all else]. She was about to disclose [the matter concerning] him had We not bound fast her heart that she would be of the believers.

Al-Qasas 28:12

And We had prevented from him [all] wet nurses before,[1] so she said, "Shall I direct you to a household that will be responsible for him for you while they are to him [for his upbringing] sincere?"

Al-Qasas 28:13

So We restored him to his mother that she might be content and not grieve and that she would know that the promise of Allāh is true. But most of them [i.e., the people] do not know.

This story teaches us that whatever Allah has destined is what will happen or take place.