Narrated Abû Mûsa (radhi Allahu anhu) : Allah’s Messenger (salallahu alaihi wa sallam) said, “Many amongst men reached (the level of) perfection but none amongst the women reached this level except Assiyya – Pharaoh’s wife, and Mary – the daughter of ‘Imrân. And no doubt, the superiority of ‘Aisha to other women is like the superiority of Tharid (i.e. a meat and bread dish) to other meals.” (Sahih Al-Bukharî, Vol. 4, Hadîth No. 623).

Not much is known about Assiyya, the wife of Pharaoh. She brought Moses into her home when he was a baby, as is recorded in the Quran:

And We inspired the mother of Mûsa (Moses), (saying): “Suckle him [Mûsa (Moses)], but when you fear for him, then cast him into the river and fear not, nor grieve. Verily! We shall bring him back to you, and shall make him one of (Our) Messengers.”