Komentarz do Wyjścia 13:22

לא ימיש means He — the Holy One, blessed be He — did not let depart (did not remove) את עמוד הענן יומם ועמוד האש לילה THE PILLAR OF CLOUD BY DAY NOR THE PILLAR OF FIRE BY NIGHT. — This tells us (we may gather from this) that the pillar of cloud handed over the camp to the pillar of fire and the pillar of fire handed it over to the pillar of cloud — that before the one set the other rose (Shabbat 23b).

לא ימיש, the subject is G’d. The word is in the transitive modern hiphil, meaning that G’d would not allow the pillar of cloud and the column of fire to depart from being at the head of the people either by day or by night.

לא ימיש עמוד ענן יומם, “the pillar of cloud would not depart by day, etc.” The reason the Torah repeats this is to teach that the two pillars were complementary to each other as explained by the sages in Shabbat 23.