וּבְדַבְּר֣וֹ עִמִּ֔י נִרְדַּ֥מְתִּי עַל־פָּנַ֖י אָ֑רְצָה וַיִּ֨גַּע־בִּ֔י וַיַּֽעֲמִידֵ֖נִי עַל־עָמְדִֽי׃
Now as he was speaking with me, I fell into a deep sleep with my face toward the ground; but he touched me, and set me upright.
Read midrashic interpretation of Daniel 8:18: and classical rabbinic exegesis.