Romans 8:16
The Spirit himself testifies with our spirit that we are children of God;
2 Corinthians 1:22
who also sealed us, and gave us the down payment of the Spirit in our hearts.
2 Corinthians 5:5
Now he who made us for this very thing is God, who also gave to us the down payment of the Spirit.
Ephesians 1:13
in whom you also, having heard the word of the truth, the Good News of your salvation -- in whom, having also believed, you were sealed with the Holy Spirit of promise,
2 Corinthians 1:12
For our boasting is this: the testimony of our conscience, that in holiness and sincerity of God, not in fleshly wisdom but in the grace of God we behaved ourselves in the world, and more abundantly toward you.
Ephesians 4:30
Don't grieve the Holy Spirit of God, in whom you were sealed for the day of redemption.
1 John 3:19-22
And by this we know that we are of the truth, and persuade our hearts before him,
1 John 4:13
By this we know that we remain in him and he in us, because he has given us of his Spirit.
1 John 5:10
He who believes in the Son of God has the testimony in himself. He who doesn't believe God has made him a liar, because he has not believed in the testimony that God has given concerning his Son.
Romans 8:23
Not only so, but ourselves also, who have the first fruits of the Spirit, even we ourselves groan within ourselves, waiting for adoption, the redemption of our body.
Romans 8:26
In the same way, the Spirit also helps our weaknesses, for we don't know how to pray as we ought. But the Spirit himself makes intercession for us with groanings which can't be uttered.