In the Old Testament, Pharaoh's heart was hardened, and he wouldn't let the children of Israel go.  With a mighty arm, God delivered them.  Psalm 89:13 says, "Thou hast a mighty arm:  strong is Thy hand, and high is Thy right hand."

Rich Mullins wrote a song, "Our God is an Awesome God" which was released on an album in 1988.  The opening words say:

When He rolls up His sleeves

He ain't just putting on the ritz

(Our God is an awesome God)

There's thunder in His footsteps 

And lightning in His fists

(Our God is an awesome God)

Chorus:

Our God is an awesome God

He reigns from heaven above

With wisdom, power, and love

Our God is an awesome God

We know God as being both gentle and mighty.  The song tells how how He made the heavens.

And when the sky was starless

In the void of the night

(Our God is an awesome God)

He spoke into the darkness

and created light

(Our God is an awesome God)

The lyrics and stirring melody of this song became well-known in the 1990's.  Smetimes, just the chorus is used in a worship service.  Here are the rest of the words:

And the Lord wasn't joking

When He kicked 'em out of Eden

It wasn't for no reason

That He shed His blood

His return is very close

and so you better be believing that

Our God is an awesome God.

Judgement and wrath He poured out on Sodom

Mercy and grace He gave us at the cross

I hope that you have not too quickly forgotten that

Our God is an awesome God