Verses with the word failing in the Apocrypha (2 verses):

2 Esdras 12:18
That after the time of that kingdom there shall arise great strivings, and it shall stand in peril of failing: nevertheless it shall not then fall, but shall be restored again to his beginning.

Wisdom of Solomon 17:15
Were partly vexed with monstrous apparitions, and partly fainted, their heart failing them: for a sudden fear, and not looked for, came upon them.