וּבְהַאֲרִ֧יךְ הֶֽעָנָ֛ן עַל־הַמִּשְׁכָּ֖ן יָמִ֣ים רַבִּ֑ים וְשָׁמְר֧וּ בְנֵי־יִשְׂרָאֵ֛ל אֶת־מִשְׁמֶ֥רֶת יְהוָ֖ה וְלֹ֥א יִסָּֽעוּ׃
Lors même que la nuée stationnait longtemps au-dessus du tabernacle, les enfants d’Israël, fidèles à l’observance du Seigneur, ne partaient point.
Or HaChaim
כל ימי אשר ישכון, all the days that the cloud would remain stationary, etc. Our verse details the various ways in which the cloud behaved. It also pays a compliment to the Israelites who made their own wishes correspond to G'd's wishes. The verse first tells about instances when the cloud remained stationary for a long period by stating that whenever the cloud remained in place for a long time the Israelites "were willing to remain encamped in that location during the entire length of time that the cloud showed no sign of moving." The proof for this is that the Torah speaks of יחנו in the future tense instead of reporting חנו, "they did remain in camp" in the past tense. The Torah continues by saying ובהאריך הענן, "and when the cloud tarried, etc." (verse 19), to tell us that even if the cloud remained stationary for an inordinately long period of time the Israelites did not demur but were content to stay where they were. The verse goes on to say: ושמרו בני ישראל את משמרת ה׳ ולא יסעו, "the children of Israel observed the orders of G'd and would not journey." This shows that even though there may have been times when the Israelites- had it been up to their own volition alone-would have liked to move on, they resisted such a temptation and voluntarily abided by G'd's wishes in the matter. This is why the Torah wrote ולא יסעו, "and they would not journey" instead of writing ולא נסעו, "and they did not journey," to make certain we would not interpret their remaining in a place for a long time as their first choice.
Tze'enah Ure'enah
“As soon as the cloud lifted” [9:21]. Hizkuni and Bahya write that all the Israelite’s journeys were in the morning and not midday and later.25Hizkuni, Numbers, 9:21; Bahya, Numbers, 9:19.
Chizkuni
כצאתי את העיר, “as soon as I leave the boundaries of the city;” seeing that earlier the Torah had written (verse 19) that anyone who will still be found outdoors will become a target for the hail, now, at the time when the plague was in full swing, the people might say that Moses was afraid to venture outside on account of that hail, Moses announces that he will open his hands in prayer as soon as he is beyond the borders of the city, and that the hail will not stop him from leaving the city. An alternate explanation for this phrase: Moses announces that as soon as he leaves the palace to go into the city, he will spread out his hands in prayer while inside the city. This is also what the Torah reports in verse 33: ויצא משה מעם פרעה את העיר וגו', “as soon as Moses left the presence of Pharaoh and went into the city, etc;”Yet another explanation: according to the plain meaning of the text the plague of hail was far stronger in the fields than in the city, [as there were no trees and grain fields inside the city to destroy, Ed.]. Moses said that he would leave the city to observe the damage caused by the hail and will then begin his prayer as necessary.