הֲיִפָּלֵ֥א מֵיְהוָ֖ה דָּבָ֑ר לַמּוֹעֵ֞ד אָשׁ֥וּב אֵלֶ֛יךָ כָּעֵ֥ת חַיָּ֖ה וּלְשָׂרָ֥ה בֵֽן׃
Is any thing too hard for the LORD. At the set time I will return unto thee, when the season cometh round, and Sarah shall have a son.’
Read halakhic rulings (Jewish law) on Genesis 18:14: and classical halakhic sources.