וָאֶשְׁמַ֖ע אֶת־ק֣וֹל דְּבָרָ֑יו וּכְשָׁמְעִי֙ אֶת־ק֣וֹל דְּבָרָ֔יו וַאֲנִ֗י הָיִ֛יתִי נִרְדָּ֥ם עַל־פָּנַ֖י וּפָנַ֥י אָֽרְצָה׃
Yet heard I the voice of his words; and when I heard the voice of his words, then was I fallen into a deep sleep on my face, with my face toward the ground.
Read midrashic interpretation of Daniel 10:9: and classical rabbinic exegesis.