Ephesians 2:8

for by grace are ye saved, thro' faith (and that not from us:

Colossians 1:11

being fortified in so effectual a manner, as to sustain your trials with constancy and joy:

2 Timothy 4:17

however the Lord assisted and strengthen'd me, that the gospel might be confirm'd by my remonstrance, and all the nations might hear it; so that I was deliver'd out of the mouth of the lion:

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
being fortified in so effectual a manner, as to sustain your trials with constancy and joy:
2 Timothy 4:17
however the Lord assisted and strengthen'd me, that the gospel might be confirm'd by my remonstrance, and all the nations might hear it; so that I was deliver'd out of the mouth of the lion: