Luke 1:20
And now you will be dumb and unable to speak until the day when this has taken place; because you did not believe my words--words which will be fulfilled at their appointed time."
Luke 1:37
For no promise from God will be impossible of fulfilment."
Luke 18:27
"Things impossible with man," He replied, "are possible with God."
Romans 4:20-21
Nor did he in unbelief stagger at God's promise, but became mighty in faith, giving glory to God,
Romans 6:19-21
your human infirmity leads me to employ these familiar figures--and just as you once surrendered your faculties into bondage to Impurity and ever-increasing disregard of Law, so you must now surrender them into bondage to Righteousness ever advancing towards perfect holiness.