Proverbs 25:19

A bad tooth, and a tottering foot, Is the confidence of the treacherous in a day of adversity.

Isaiah 36:6

Lo, thou hast trusted on the staff of this broken reed -- on Egypt -- which a man leaneth on, and it hath gone into his hand, and pierced it -- so is Pharaoh king of Egypt to all those trusting on him.

2 Chronicles 28:20-21

And Tilgath-Pilneser king of Asshur cometh in unto him, and doth distress him, and hath not strengthened him,

Job 6:14-20

To a despiser of his friends is shame, And the fear of the Mighty he forsaketh.

Isaiah 30:1-3

Woe to apostate sons, The affirmation of Jehovah! To do counsel, and not from Me, And to spread out a covering, and not of My spirit, So as to add sin to sin.

Ezekiel 29:6-7

And known have all inhabitants of Egypt That I am Jehovah, Because of their being a staff of reed to the house of Israel.

2 Timothy 4:16

in my first defence no one stood with me, but all forsook me, (may it not be reckoned to them!)

Treasury of Scripture Knowledge

Summary

Confidence in an unfaithful man in time of trouble is like a broken tooth, and a foot out of joint.

Bible References

General references

2 Chronicles 28:20
And Tilgath-Pilneser king of Asshur cometh in unto him, and doth distress him, and hath not strengthened him,
Job 6:14
To a despiser of his friends is shame, And the fear of the Mighty he forsaketh.
Isaiah 30:1
Woe to apostate sons, The affirmation of Jehovah! To do counsel, and not from Me, And to spread out a covering, and not of My spirit, So as to add sin to sin.
Isaiah 36:6
Lo, thou hast trusted on the staff of this broken reed -- on Egypt -- which a man leaneth on, and it hath gone into his hand, and pierced it -- so is Pharaoh king of Egypt to all those trusting on him.
Ezekiel 29:6
And known have all inhabitants of Egypt That I am Jehovah, Because of their being a staff of reed to the house of Israel.
2 Timothy 4:16
in my first defence no one stood with me, but all forsook me, (may it not be reckoned to them!)