Exodus 3:19

And I know that the king of Egypt will not give you leave to go, no, not by a mighty hand.

Exodus 5:2

And Pharaoh said, Who is LORD, that I should hearken to his voice to let Israel go? I do not know LORD, and moreover I will not let Israel go.

Exodus 6:1

And LORD said to Moses, Now thou shall see what I will do to Pharaoh. For by a strong hand he shall let them go, and by a strong hand he shall drive them out of his land.

Exodus 7:1-14

And LORD said to Moses, See, I have made thee as God to Pharaoh, and Aaron thy brother shall be thy prophet.

Psalm 136:11-12

and brought out Israel from among them, for his loving kindness [is] forever,

Isaiah 63:12-13

who caused his glorious arm to go at the right hand of Moses, who divided the waters before them, to make himself an everlasting name,

Treasury of Scripture Knowledge

Summary

And I am sure that the king of Egypt will not let you go, no, not by a mighty hand.

No, not by a mighty hand

Bible References

Will not

Exodus 5:2
And Pharaoh said, Who is LORD, that I should hearken to his voice to let Israel go? I do not know LORD, and moreover I will not let Israel go.
Exodus 7:4
But Pharaoh will not hearken to you. And I will lay my hand upon Egypt, and bring forth my armies, my people the sons of Israel, out of the land of Egypt by great judgments.

No, not by a mighty hand

Exodus 6:1
And LORD said to Moses, Now thou shall see what I will do to Pharaoh. For by a strong hand he shall let them go, and by a strong hand he shall drive them out of his land.
Psalm 136:11
and brought out Israel from among them, for his loving kindness [is] forever,
Isaiah 63:12
who caused his glorious arm to go at the right hand of Moses, who divided the waters before them, to make himself an everlasting name,