Israel came to God seeking repentance. 
They said:

Please forgive us. 

Please graciously accept us. 

We won’t follow after false gods. 

Our trust won’t be in what we can do.

We know that blessings come from you.

We know you are merciful. 
God’s response was this:

I will heal you.

I will love you.

I am not mad at you. 

I will bless you.

I will make you to prosper. 
Seeking forgiveness and receiving it from the Lord is that simple.
Scripture taken from:

Hosea 14:2-7