Luke 22:32
But I have prayed for you, Simon, that your faith fail not. And when you have turned to me again, strengthen your brethren.
Luke 22:43
And there appeared to him an angel from heaven, to strengthen him.
Ephesians 4:29
Let no impure speech come out of your mouth, but whatever is good for needful edification, that it may give grace to the hearers:
Colossians 4:6
Let your speech be always with grace, seasoned with salt, that you may know how you ought to answer every one.
Hebrews 12:12
Wherefore, lift up the hands that hang down, and strengthen the feeble knees,