'Stumbles' in the Bible

Don’t gloat when your enemy falls,and don’t let your heart rejoice when he stumbles,

None of them grows weary or stumbles;no one slumbers or sleeps.No belt is looseand no sandal strap broken.

The nations have heard of your dishonor,and your outcry fills the earth,because warrior stumbles against warriorand together both of them have fallen.

Yet he has no root in himself, but is short-lived. When pressure or persecution comes because of the word, immediately he stumbles.