Ezekiel 29

“Then all the inhabitants of Egypt
Shall know that I am the Lord,
Because they have been a staff of reed to the house of Israel.
7 When they took hold of you with the hand,
You broke and tore all their shoulders;
When they leaned on you,
You broke and made all their backs quiver.” vv.6-7

Read chapter 29
Israel turned to depend on Egypt again.  After the Exodus out of Egypt there were told not to go back to Egypt to multiply horse (to build army) yet Israel did turn back to them as their safety and help.  Just like when they complained during the exodus to return back to Egypt and become slaves because they thought it was better and didn't have faith, so here they "returned" back to Egypt for help than to God.  Yet that proved false for them again as the support of the ally they thought Egypt was it fell through.  When they leaned on them they fell.  Judah's dependance on Egypt is described as holding on to a broken reed. I don't know if you've ever tried leaning on a whole or broken reed, but it doesn't support at all, it's ridiculous just as it was for Judah to depend on Egypt, yet they still trusted in her despite.  Israel made an alliance with Egypt as their "backup" to God, yet ultimately God they treated as their backup and turned to them when Egypt could do nothing for them.  
Who or what do you put as your ally over God as your ally?  When do you rely more on your back up then going to God first for help in trouble?  What have you leaned on on to fall and break more than you thought you would?