Luke 1:20
And, behold, you shall be silent, and not able to speak, until the day that these things shall come to pass; because you did not believe my words, which shall be fulfilled in their season."
Luke 1:37
because no word from God shall be without power."
Luke 18:27
But He said, "The things impossible with men are possible with God."
Romans 4:20-21
but, in view of the promise of God, he wavered not through unbelief, but was made strong in faith, giving glory to God,
Romans 6:19-21
I speak after human fashion because of the weakness of your flesh; for, as ye presented your members subservient to uncleanness, and to iniquity unto iniquity; so now present your members subservient to righteousness unto holiness.