King James Version
For as the lightning, that lighteneth out of the one part under heaven, shineth unto the other part under heaven; so shall also the Son of man be in his day.English Standard Version
For as the lightning flashes and lights up the sky from one side to the other, so will the Son of Man be in his day.Catholic Public Domain Version
For just as lightning flashes from under heaven and shines to whatever is under heaven, so also will the Son of man be in his day