וַיְהִ֣י ׀ כִּמְלֹ֣את הַכֵּלִ֗ים וַתֹּ֤אמֶר אֶל־בְּנָהּ֙ הַגִּ֨ישָׁה אֵלַ֥י עוֹד֙ כֶּ֔לִי וַיֹּ֣אמֶר אֵלֶ֔יהָ אֵ֥ין ע֖וֹד כֶּ֑לִי וַֽיַּעֲמֹ֖ד הַשָּֽׁמֶן׃
And it came to pass, when the vessels were full, that she said unto her son: ‘Bring me yet a vessel.’ And he said unto her: ‘There is not a vessel more.’ And the oil stayed.
Read kabbalistic (mystical) interpretation of II Kings 4:6: and classical mystical sources.