God is faithful.

1 Corinthians 10:1

God is not a man that he should lie; neither the Son of man that he should repent: hath he said, and shall he not do it? or hath he spoken, and shall he not make it good? — The Lord sware and will not repent.

God, willing more abundantly to shew unto the heirs of promise the immutability of his counsel, confirmed it by an oath: that by two immutable things, in which it was impossible for God to lie, we might have a strong consolation, who have fled for refuge to lay hold upon the hope set before us. — Wherefore let them that suffer according to the will of God commit the keeping of their souls to him in well doing, as unto a faithful Creator.

I know whom I have believed, and am persuaded that he is able to keep that which I have committed unto him against that day — Faithful is he that calleth you, who also will do it. — All the promises of God in him are yea, and in him Amen, unto the glory of God by us.

Numbers 23:19. Hebrews 7:21. Hebrews 6:17,18. 1 Peter 4:19. 2 Timothy 1:12. 1 Thessalonians 5:24. 2 Corinthians 1:20.