What do you mean?
like selling a soul
That's how it started with me when ocd became too much to handle, seek therapy, you cant give away what you don't own. You belong to your Heavenly Father God, He made you He loves you He will never abandon you. Let not this be a form of reassurance but a truth to know, the thoughts won't go away by just doing reassurance, it takes time and understanding of how ocd works, therapy will help, spiritual guidance will help, you're not the only one who has those intrusive thoughts, don't worry, ocd will not defeat you, the Lord is bigger than our fears. God bless you, don't be afraid.
I have religious OCD too, it’s bad. Constant anxiety that I can’t be forgiven for something and am going to hell. Fear is always looming. I try to remember “my grace is sufficient for you” and “whoever comes to me I will never drive away”. Part of faith is walking through and moving forward through uncertainty. We can never be 100% sure being mere humans, but I am confident that God is good and he is 100% loving and gracious and he calls us to be the same to others. I will pray for you and me and all those suffering from religious OCD. God, give us the strength to resist our compulsions and to know you are for us despite our feelings.