Psalm 40:10 I have not hid thy righteousness within my heart; I have declared thy faithfulness and thy salvation: I have not concealed thy lovingkindness and thy truth from the great congregation.

Psalm 89:2 For I have said, Mercy shall be built up for ever: thy faithfulness shalt thou establish in the very heavens.

Matthew 8:7-10 And Jesus saith unto him, I will come and heal him. The centurion answered and said, Lord, I am not worthy that thou shouldest come under my roof: but speak the word only, and my servant shall be healed. For I am a man under authority, having soldiers under me: and I say to this man, Go, and he goeth; and to another, Come, and he cometh; and to my servant, Do this, and he doeth it. When Jesus heard it, he marvelled, and said to them that followed, Verily I say unto you, I have not found so great faith, no, not in Israel.

Romans 1:5 By whom we have received grace and apostleship, for obedience to the faith among all nations, for his name:

Having faith means living by it and not just claiming it.