Romans 10:10

1 John 4:15 NIV
If anyone acknowledges that Jesus is the Son of God, God lives in them and they in God.

John 1:12-13 NIV
Yet to all who did receive him, to those who believed in his name, he gave the right to become children of God — children born not of natural descent, nor of human decision or a husband’s will, but born of God.

Romans 10:9 NIV
If you declare with your mouth, “Jesus is Lord,” and believe in your heart that God raised him from the dead, you will be saved.