Therefore you do not lack any spiritual gift as you eagerly wait for our Lord Jesus Christ to be revealed. He will also keep you firm to the end, so that you will be blameless on the day of our Lord Jesus Christ. God is faithful, who has called you into fellowship with his Son, Jesus Christ our Lord. 1 Corinthians 1:7-9

Know therefore that the Lord your God is God, he is the faithful God, keeping his covenant of love to a thousand generations of those who love him and keep his commandments. Deuteronomy 7:9

Your word Lord is eternal; it stands firm in the heavens. Your faithfulness through all generations; you established the earth, and it endures. Psalms 119:89-90

May God himself, the God of peace, sanctify you through and through. May your whole spirit, soul and body be kept blameless at the coming of our Lord Jesus Christ. The one who calls you is faithful and he will do it. 1 Thessalonians 5:23-24

No temptation has overtaken you except what is common to mankind. And God is faithful; he will not allow you to be tempted beyond what you can bear. But when you are tempted, he will also provide you a way out so that you can endure it. 1 Corinthians 10:13

If we confess our sins, he is faithful and just and will forgive our sins and purify us from all unrighteousness. 1 John 1:9