Luke 22:32
But I have prayed for you, that your faith may not fail; and when you have turned again, strengthen your brethren."
Luke 22:43
An angel appeared to him from heaven, and strengthened him.
Ephesians 4:29
Let no unwholesome talk come out of your mouths, but only such as is good for building others up according to the need of the moment, that it may impart grace to those who hear.
Colossians 4:6
Let your speech always be full of grace, seasoned with salt, so that you may know how you ought to answer everyone.
Hebrews 12:12
Therefore lift your feeble hands and strengthen your weak knees,