The Spirit himself testifies with our spirit that we are children of God; — Romans 8:16

This is he who came by water and blood, Jesus Christ; not with the water only, but with the water and the blood. It is the Spirit who testifies, because the Spirit is the truth. — 1 John 5:6

Don’t grieve the Holy Spirit of God, in whom you were sealed for the day of redemption. — Ephesians 4:30

But they rebelled, and grieved his holy Spirit. Therefore he turned and became their enemy, and he himself fought against them. — Isaiah 63:10

But Peter said, “Ananias, why has Satan filled your heart to lie to the Holy Spirit, and to keep back part of the price of the land? While you kept it, didn’t it remain your own? After it was sold, wasn’t it in your power? How is it that you have conceived this thing in your heart? You haven’t lied to men, but to God.” — Acts 5:3

But the one and the same Spirit produces all of these, distributing to each one separately as he desires. — 1 Corinthians 12:11

As they served the Lord and fasted, the Holy Spirit said, “Separate Barnabas and Saul for me, for the work to which I have called them.” — Acts 13:2

For who among men knows the things of a man, except the spirit of the man, which is in him? Even so, no one knows the things of God, except God’s Spirit. — 1 Corinthians 2:11

However when he, the Spirit of truth, has come, he will guide you into all truth, for he will not speak from himself; but whatever he hears, he will speak. He will declare to you things that are coming. He will glorify me, for he will take from what is mine, and will declare it to you. — John 16:13

But the one and the same Spirit produces all of these, distributing to each one separately as he desires. — 1 Corinthians 12:11

As they served the Lord and fasted, the Holy Spirit said, “Separate Barnabas and Saul for me, for the work to which I have called them.” — Acts 13:2