Luke 22:32
But I have prayed for thee, that thy faith fail not. And do thou, when thou hast returned to me, strengthen thy brethren.
Luke 22:43
And there appeared to him an angel from heaven, strengthening him.
Ephesians 4:29
Let no foul language proceed out of your mouth, but whatever is good for edification, as the need may be, that it may benefit the hearers;
Colossians 4:6
Let your speech be always with grace, seasoned with salt, that ye may know how ye ought to answer every one.
Hebrews 12:12
Wherefore lift up the hands which hang down, and the feeble knees;