כַּ֤ד הַקֶּ֙מַח֙ לֹ֣א כָלָ֔תָה וְצַפַּ֥חַת הַשֶּׁ֖מֶן לֹ֣א חָסֵ֑ר כִּדְבַ֣ר יְהוָ֔ה אֲשֶׁ֥ר דִּבֶּ֖ר בְּיַ֥ד אֵלִיָּֽהוּ׃ (פ)
The jar of meal was not spent, neither did the cruse of oil fail, according to the word of the LORD, which He spoke by Elijah.
Read halakhic rulings (Jewish law) on I Kings 17:16: and classical halakhic sources.