John 3 verses 16-17 couldn't put it more clearly...
16 For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. 17 For God did not send his Son into the world to condemn the world, but to save the world through him. 18 Whoever believes in him is not condemned, but whoever does not believe stands condemned already because they have not believed in the name of God’s one and only Son.
Here are some more Bible verses
Matthew 10:33
But whoever denies me before men, I also will deny before my Father who is in heaven.
So everyone who acknowledges me before men, I also will acknowledge before my Father who is in heaven,
But false prophets also arose among the people, just as there will be false teachers among you, who will secretly bring in destructive heresies, even denying the Master who bought them, bringing upon themselves swift destruction.
“I the Lord search the heart and test the mind, to give every man according to his ways, according to the fruit of his deeds.”
Put on the whole armor of God, that you may be able to stand against the schemes of the devil.
For “everyone who calls on the name of the Lord will be saved.”
Here are some more verses on Open Bible...