Isaiah 30:13

Disaster will follow their policy with the necessity of a natural law. The best translation seems to be: Therefore this guilt shall be to you as a rent descending (lit. "falling") ( and) bulging out in a high wall, whose crash comes, &c. The slight beginnings of transgression, its inevitable tendency to gravitate more and more from the moral perpendicular, till a critical point is reached, then the suddenness of the final catastrophe, are vividly expressed by this magnificent simile. Comp. Psalms 62:3.

suddenly at an instant Cf. ch. Isaiah 29:5.