2 Corinthians 4:1

Hence, as I hold this ministry by God's mercy to me, I never lose heart in it;

2 Corinthians 4:16

Hence I never lose heart; though my outward man decays, my inner man is renewed day after day.

Hebrews 12:3

Compare him who steadily endured all that hostility from sinful men, so as to keep your own hearts from fainting and failing.

Hebrews 12:5

And have you forgotten the word of appeal that reasons with you as sons? ??My son, never make light of the Lord's discipline, never faint under his reproofs;

Treasury of Scripture Knowledge

Summary

But now it is come upon thee, and thou faintest; it toucheth thee, and thou art troubled.

Bible References

Thou faintest

2 Corinthians 4:1
Hence, as I hold this ministry by God's mercy to me, I never lose heart in it;
Hebrews 12:3
Compare him who steadily endured all that hostility from sinful men, so as to keep your own hearts from fainting and failing.