Ephesians 2:8

For you have been saved by God's unearned favor, through [your] faith, and that [salvation] was not the result of your own doing; it was the gift from God.

Colossians 1:11

[We also pray that you will be] strengthened with great power, according to God's glorious might, so that you will have great endurance and patience [coupled] with joy.

2 Timothy 4:17

But the Lord stood by me and strengthened me, so that through me the message could be fully proclaimed and that all the Gentiles could hear it. And I was rescued from the lion's mouth. [Note: This is probably a figure of speech indicating that Paul had escaped some immediate danger. See Psa. 22:20-21].

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
[We also pray that you will be] strengthened with great power, according to God's glorious might, so that you will have great endurance and patience [coupled] with joy.
2 Timothy 4:17
But the Lord stood by me and strengthened me, so that through me the message could be fully proclaimed and that all the Gentiles could hear it. And I was rescued from the lion's mouth. [Note: This is probably a figure of speech indicating that Paul had escaped some immediate danger. See Psa. 22:20-21].