Bible verse that says i wil do a new things

I think you might be thinking of Isaiah 43:19, which says:

"I will make a way in the wilderness and rivers in the desert. I will plant the heavens with a people and the earth with your offspring. I will say to the north, 'Give them up,' and to the south, 'Do not hold them back.' Bring my sons from afar and my daughters from the end of the earth—everyone who is called by my name, whom I created for my glory, whom I formed and made." (NIV)

Or, in some translations, it says:

"I will do a new thing, now it shall spring forth; shall ye not know it? I will even make a way in the wilderness and rivers in the desert." (KJV)

This verse is often interpreted as a promise from God that He will do something new and unexpected, and that He will make a way where there seems to be no way. It's a message of hope and encouragement, reminding us that God is always working to bring about new things and to fulfill His purposes.