Translation:

141. And remember We rescued you from Pharaoh's people who afflicted you with the worst of penalties who slew your male children and saved alive your females: in that was a momentous trial from your Lord.

Notes (Tafseer)

1099. This is Allah's reminder to Israel through the mouth of Moses. There was a double trial: (1) while the bondage lasted, the people were to learn patience and constancy in the midst of affliction: (2) when they were rescued, they were to learn humility; justice, and righteous deeds of prosperity.