Surah Al-Qasas 28:9

وَقَالَتِ ٱمْرَأَتُ فِرْعَوْنَ قُرَّتُ عَيْنٍ لِّى وَلَكَ ۖ لَا تَقْتُلُوهُ عَسَىٰٓ أَن يَنفَعَنَآ أَوْ نَتَّخِذَهُۥ وَلَدًا وَهُمْ لَا يَشْعُرُونَ

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.

Translation: Saheeh International

Tafsir

And Pharaoh’s wife said after he and his aids had resolved to slay him he is ‘A joyous sight for me and you. Do not slay him. Perhaps he will be of benefit to us or we will adopt him as a son’ and so they obeyed her wish. And they were not aware of the sequel to their affair with him.

Excerpt from Tafsir al-Jalalayn, commentary on 28:9, via Quran.com. The reader has the full commentary and 9 more tafsirs.