Romans 6:23 – For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
Romans 10:9 – because, if you confess with your mouth that Jesus is Lord and believe in your heart that God raised him from the dead, you will be saved.
Romans 3:22 – The righteousness of God through faith in Jesus Christ for all who believe. For there is no distinction:
Romans 3:23 – For all have sinned and fall short of the Glory of God
Romans 3:24 – And are justified by his grace as a gift, through the redemption that is in Christ Jesus,
You can pray a prayer similiar to this, while truly meaning it in your heart:
Father in Heaven, I know I’m a sinner, I know you sent your Son Jesus Christ to pay the price for my sin. It’s a price I couldn’t pay and Christ payed it for me, I repent, turn from my sin and put my trust and faith in Jesus Christ as my Lord and Saviour.
For a more detailed explanation on what Christ did for you: How to be saved