It was narrated that Ibn Abbaas (RA) said Prophet of Allah [Peace and Blessings of Allah be upon him]
drew four lines on the ground, then said: “Do you know what this is”? We said, “Allah and His Messenger know best.” Prophet [peace and blessings of Allah be upon him] said: “The Best of the women of Paradise are
1: Khadeejah bint Khuwaylid
2: Faatimah bint Muhammad
3: Aasiyah bint Mazaahim  [the wife of Pharaoh]
4: Maryam bint Imraan ~ [may Allah be pleased with them all.]
Source: Ahmad # 2663. Classed as Saheeh by al-Albaani.}in Saheeh al-Jaami # 1135.

It was narrated from Anas (RA) that the Prophet (peace be upon him) said: “Sufficient for you among the women of the world are
Maryam the daughter of Imran.
Khadeejah bint Khuwaylid.
Faatimah bint Muhammad.
Aasiyah the wife of Pharaoh.”
(Source: Narrated and classed as Saheeh by al-Tirmidhi H # 3878)

Aasiyah bint Mazaahim (R.A)[The Wife of Pharaoh] The Qur`an has presented Aasiyah bint Mazaahim (R.A.) as one of the best role models for women. Aasiyah (r.a.) greatness is in the fact that although she was the wife of one of the most powerful, arrogant, and tyrant rulers of Egypt, she was able to see and accept the truth in the message of Prophet Musa [Alaihis Salam].

For her, wealth, beauty, or status was not the main criterion of human excellence; she realized that without faith in God, a human being has nothing. [ALLAH had chosen her to provide refuge to Musa [Alaihis Salam] when he was an infant.] When her maids brought the cradle of Musa [A.S.] from the river, she insisted to Pharaoh that she wanted to adopt that infant as a child. The wife of Pharaoh said. ‘Here is the joy of the eye, for me and for thee: slay him not. It may be that he will be use to us, or we may adopt him as a son.’And they perceived not what they were doing. {Source  Qur’an Surat Al-Qasas (The Stories) 28 A #9 }

Aasiyah bint Mazaahim (r.a.) had declared her faith in the message of God after witnessing the miracle of Musa [Alaihis Salam] in the Court of the Pharaoh; and after witnessing the death of another believing woman under torture. Pharaoh tried to turn her away from the God of Moses and sought her mother’s help. But Aasiyah (r.a.) refused to reject the God of Moses. Pharoah said ‘Believe ye in Him before I give you permission? Surely this must be your leader who has taught you magic Be sure I will cut off your hands and feet on opposite sides, and I will have you crucified on trunks of palm trees: so shall ye know for certain, which of us can give the more severe and the more lasting punishment’.
{ Source: Qur’an Surat Ţaha (Ta-Ha) 20 A # 71 }

On Pharaoh’s order, she was tortured to death.  The Qur’an sets her as an example for believers to stay away from evil and sin despite the full assault of the devil: Allah sets forth an example for those who believe- the wife of Pharaoh who said ‘ My Lord, build for me with You a house in Heaven and save me from the Pharaoh and his doings, and save me from an unjust people.’
[Source Qur’an Surat At-Tahrim (The Prohibition) 66  A # 11]

A Lil Note: In this Lady, we see the example of supreme sacrifice by marrying Pharaoh, Aasiyah bint Muzahim became the Queen of Egypt, she gained everything that she wanted in this worldly life from the materialistic point of view: the best of clothes, food, palaces, jewels, servants and maids, etc. But she sacrificed all that to be closer to Allah {Azza Wa Jall} And that is why we see her included by the Prophet [Peace be upon him] in the list of the four women who attained the level of perfection.