'Once' in the Bible

Long time have I holden my peace; I have been still, I have restrained myself: I will cry like a woman that travaileth; I will blow and pant at once.

Who hath heard such a thing? who hath seen such things? Can a land be made to bring forth in one day? shall a nation be born at once? For as soon as Zion travailed, she brought forth her sons.