Deuteronomy 1:33

1:33 the one who was constantly going before you to find places for you to set up camp. He appeared by fire at night and cloud by day, to show you the way you ought to go.

Deuteronomy 4:11

4:11 You approached and stood at the foot of the mountain, a mountain ablaze to the sky above it ¹  and yet dark with a thick cloud. ² 

[4:11]  ¹ tn Heb “a mountain burning with fire as far as the heart of the heavens.” The Hebrew term שָׁמַיִם (shamayim) may be translated “heaven(s)” or “sky” depending on the context.

[4:11]  ² tn Heb “darkness, cloud, and heavy cloud.”