The bush was burning in fire, and the bush was not consumed.
וַיֵּרָא מַלְאַךְ ה' אֵלָיו בְּלַבַּת אֵשׁ מִתּוֹךְ הַסְּנֶה וַיַּרְא וְהִנֵּה הַסְּנֶה בֹּעֵר בָּאֵשׁ וְהַסְּנֶה אֵינֶנּוּ אֻכָּל׃
שמות ג:ב
"And an angel of Hashem appeared to him in a flame of fire from within the bush, and he saw, and behold, the bush was burning in fire, and the bush was not consumed."
Exodus 3:2
Remove your shoes from your feet.
וַיֹּאמֶר אַל תִּקְרַב הֲלֹם שַׁל נְעָלֶיךָ מֵעַל רַגְלֶיךָ כִּי הַמָּקוֹם אֲשֶׁר אַתָּה עוֹמֵד עָלָיו אַדְמַת קֹדֶשׁ הוּא׃
שמות ג:ה
"And He said: Do not come closer. Remove your shoes from your feet, for the place on which you stand is holy ground."
Exodus 3:5
And Moshe hid his face.
וַיַּסְתֵּר מֹשֶׁה פָּנָיו כִּי יָרֵא מֵהַבִּיט אֶל הָאֱלֹקִים׃
שמות ג:ו
"And Moshe hid his face, for he was afraid to look toward God."
Exodus 3:6