וַיֹּ֙אמֶר֙ אֵֽלִיָּ֔הוּ חַ֚י יְהוָ֣ה צְבָא֔וֹת אֲשֶׁ֥ר עָמַ֖דְתִּי לְפָנָ֑יו כִּ֥י הַיּ֖וֹם אֵרָאֶ֥ה אֵלָֽיו׃
And Elijah said: ‘As the LORD of hosts liveth, before whom I stand, I will surely show myself unto him to-day.’
Read kabbalistic (mystical) interpretation of I Kings 18:15: and classical mystical sources.