Ephesians 2:8

For by grace you have been saved through faith, and that not of yourselves; it is God's gift.

Colossians 1:11

that you may be strengthened in every kind of strength by the might of his glory for every kind of patience and fortitude with good cheer.

2 Timothy 4:17

Nevertheless the Lord Jesus stood by me, and strengthened my heart, that through me full proclamation of the gospel might be made, and the Gentiles might hear it; and I was rescued from the lion's jaws.

Treasury of Scripture Knowledge

Summary

But the salvation of the righteous is of the LORD: he is their strength in the time of trouble.

Bible References

Strength

Colossians 1:11
that you may be strengthened in every kind of strength by the might of his glory for every kind of patience and fortitude with good cheer.
2 Timothy 4:17
Nevertheless the Lord Jesus stood by me, and strengthened my heart, that through me full proclamation of the gospel might be made, and the Gentiles might hear it; and I was rescued from the lion's jaws.