John 3:33
He that has received his testimony has set his seal to this that God is true.
John 6:27
Labor not for the food which perishes, but for that food which endures unto everlasting life, which the Son of man shall give unto you: for on him has God the Father set his seal.
Romans 3:3-4
For what if some did not believe? shall their unbelief make the faithfulness of God without effect?
Romans 4:18-21
Who against hope believed in hope, that he might become the father of many nations, according to that which was spoken, So shall your descendants be.
2 Corinthians 1:18
But as God is true, our word toward you was not yea and nay.
2 Corinthians 1:22
Who has also sealed us, and given the earnest of the Spirit in our hearts.
Ephesians 1:13
In whom you also trusted, after you heard the word of truth, the gospel of your salvation: in whom also after you believed, you were sealed with that Holy Spirit of promise,
Titus 1:1-2
Paul, a servant of God, and an apostle of Jesus Christ, according to the faith of God's elect, and the acknowledging of the truth which is after godliness;
Hebrews 6:17
So God, willing more abundantly to show unto the heirs of promise the immutability of his counsel, confirmed it by an oath:
1 John 5:9-10
If we receive the witness of men, the witness of God is greater: for this is the witness of God which he has testified of his Son.
Revelation 7:3-8
Saying, Hurt not the earth, neither the sea, nor the trees, till we have sealed the servants of our God on their foreheads.