Exodus 14:19

וילך מאחריהם AND WENT BEHIND THEM to divide the camp of Egypt from the camp of Israel and to receive the arrows and the missiles of the Egyptians. Everywhere it says “The Angel of the Lord (ה׳)” whilst here we have The Angel of God (אלהים).”! The name אלהים really denotes, wherever it occurs, “Judge” (lit., “judgment”). Therefore the use of this term here teaches us that Israel was, at that moment, arraigned in judgment, whether to be saved or to be destroyed together with Egypt (Mekhilta). ויסע עמוד הענן AND THE PILLAR OF CLOUD WENT [FROM BEFORE THEM] — When it became dark and the pillar of cloud handed over the camp to the pillar of fire, the cloud did not go away as it was accustomed to go away altogether in the evening, but it went and betook itself behind them to make it dark for the Egyptians.

וַיִּסַּ֞ע מַלְאַ֣ךְ הָאֱלֹהִ֗ים הַהֹלֵךְ֙ לִפְנֵי֙ מַחֲנֵ֣ה יִשְׂרָאֵ֔ל וַיֵּ֖לֶךְ מֵאַחֲרֵיהֶ֑ם וַיִּסַּ֞ע עַמּ֤וּד הֶֽעָנָן֙ מִפְּנֵיהֶ֔ם וַֽיַּעֲמֹ֖ד מֵאַחֲרֵיהֶֽם׃

And the angel of God, who went before the camp of Yisra᾽el, removed and went behind them; and the pillar of the cloud went from before their face, and stood behind them: