'Certain' in the Bible

For I assure you and most solemnly say to you, until heaven and earth pass away, not the smallest letter or stroke [of the pen] will pass from the Law until all things [which it foreshadows] are accomplished.

They do all their deeds to be seen by men; for they make their phylacteries (tefillin) wide [to make them more conspicuous] and make their tassels long.

He said, “Go into the city to a certain man, and say to him, ‘The Teacher says, “My time [to suffer and atone for sin] is near; I am to keep the Passover at your house with My disciples.”’”