2 Corinthians 4:1
So, because I hold a place in this ministry and that because I have had God's mercy shown me, I never give up.
2 Corinthians 4:16
So I never give up; instead, although my outer nature is wasting away, my inner nature is constantly renewed from day to day.
Hebrews 12:3
Yes, to keep from growing weary and fainthearted, just think of the examples set by Him who has endured so great opposition aimed at Him by sinful men!
Hebrews 12:5
and you have forgotten the encouragement which is addressed to you as sons: "My son, refrain from thinking lightly of the discipline the Lord inflicts, and giving up when you are corrected by Him.