וּבְדַבְּר֣וֹ עִמִּ֔י כַּדְּבָרִ֖ים הָאֵ֑לֶּה נָתַ֧תִּי פָנַ֛י אַ֖רְצָה וְנֶאֱלָֽמְתִּי׃
And when he had spoken unto me according to these words, I set my face toward the ground, and was dumb.
Read halakhic rulings (Jewish law) on Daniel 10:15: and classical halakhic sources.