What excuse did the Hebrew midwives give Pharaoh for letting the baby boys live?

Answer: They gave birth before midwives came

"The Hebrew women are not like the Egyptian women, for they are vigorous and give birth before a midwife arrives" (KJV: "lively").

“The midwives answered Pharaoh, “The Hebrew women are not like the Egyptian women, for they are vigorous and give birth before a midwife arrives.””— Exodus 1:19 (BSB)