Luke 22:32
But I prayed earnestly for you, that your faith would not fail [to be strong]. And when you have turned back [i.e., from going astray briefly], provide [spiritual] support to your brothers."
Luke 22:43
Now an angel from heaven appeared to Him and strengthened Him. [See Matt. 4:11].
Ephesians 4:29
Do not allow unwholesome [Note: The Greek word for "unwholesome" is "rotten, diseased"] language to come from your mouth, but only what is helpful for building up those who need it, so that you can impart favor [i.e., benefit] to those who listen [to you].
Colossians 4:6
Your speech should always be favorable, seasoned with salt [i.e., interesting and appropriate], so that you may know how to properly answer each person [you talk with].
Hebrews 12:12
Therefore, [Prov. 4:26 says], "Strengthen your limp hands and weak knees;