Job 13:12 Your memorable sayings are proverbs of ashes, Your defences are defences of clay. (ASV)
Isaiah 25:12 And the fortress of the high defences of thy walls will he bring down, lay low, bring to the ground, into the dust. (DBY)
Nahum 2:1 A maul is come up before thy face; guard the defences, watch the way, make thy loins strong, fortify thy power mightily!-- (JPS)