'Instant' in the Bible

Moreover the multitude of thy strangers shall be like small dust, and the multitude of the terrible ones shall be as chaff that passeth away: yea, it shall be at an instant suddenly.

Therefore this iniquity shall be to you as a breach ready to fall, swelling out in a high wall, whose breaking cometh suddenly at an instant.

Who has heard of such a thing?Who has seen such things?Can a land be born in one dayor a nation be delivered in an instant?Yet as soon as Zion was in labor,she gave birth to her sons.