Mattityahu 24:19-21

Orthodox Jewish Bible

¹⁹ But oy to the ones with child and the ones with nursing infants in those days.

²⁰ But offer tefillos that your escape may not be in winter or on Shabbos.

²¹ For then will be Tzarah Gedolah (Great Tribulation) such as has not been from Reshit HaOlam (Beginning of the World) until now nor will it by any means happen again.