Commentary for Exodus 40:38

לעיני כל בית ישראל בכל מסעיהם [THE CLOUD WAS ON THE TABERNACLE] … IN THE SIGHT OF ALL THE HOUSE OF ISRAEL, THROUGHOUT ALL THEIR JOURNEYS — At every מסע which they made (according to Rashi this means: at every station at which they stopped) the cloud rested upon the Tabernacle in the place where they encamped. A place where they encamped is also called מסע (the literal meaning of which is “journey”). Similar is, (Genesis 13:3) “And he went on to his resting places (למסעיו)“ (cf. Rashi on this verse); similar also is, (Numbers 33:1) “These are the מסעי” — “the places of encampment”. Because from the place of encampment they always set out again on a new journey therefore all the different stages of their journeys (including the places where they encamped) are called מסעות.

Their encampment is also called מסע . . . Rashi is answering the question: While Yisrael traveled, the cloud did not rest. Rather, B’nei Yisrael encamped only when the cloud rested, and in that place. Why does the verse say, “In all their travels,” implying that the cloud rested even while they traveled? Rashi answers, “Their encampment is also calle מסע .” Accordingly, the verse conveys, “In all their encampments.” It does not mean literally, “In all their travels,” because then the cloud was not upon the mishkon.

לעיני כל בית ישראל בכל מטעיהם, “in view of all theChildren of Israel during all their journeys.” According to Rashi, the meaning of this line is that while the Israelites were encamped as opposed to when they were journeying.