פּירוש אויף במדבר 1:2

למשפחתם — [TAKE YE THE SUM OF THE CONGREGATION …] AFTER THEIR FAMILIES — in order to ascertain the number of individuals in each tribe.

“Lift up the head etc.” Although Rashi explained this as a term for “taking an accounting” (Exodus 30:12), nevertheless it used the language of lift up [se’u], when you lift up [ki tissa], lift up [nassa], because through the act of counting, God elevates and lifts them with greater elevation above all nations who do not have an individual count, like the straw that the owner of the threshing floor does not count. Similarly, the nations do not have individual Providence, only general providence for the preservation of the species, like other animals and beasts of the field. But each individual from Israel is watched over specifically, and even one of them is considered as important as an entire nation, as it says, and many of them will fall (Exodus 19:21) — even if only one of them falls, it is considered as if many have fallen. Therefore, the Holy One, blessed be He, gave them a count like the stars, about which it is said, He brings out their host by number, He calls them all by name (Isaiah 40:26). So too it is said here by the number of names to indicate that those who lead the many to righteousness are like stars forever (Daniel 12:3), and each one has individual Providence. And regarding the contradiction raised in Yoma 22b between verses — it is written, the number of the children of Israel (Hosea 2:1), which implies they have a number, and then it says, like the sand of the sea, which cannot be measured nor counted — according to the simple meaning, this is not a contradiction, because with the Holy One, blessed be He, they certainly have a number like the stars that He brings out and brings in by number. Thus they have a number to indicate that the Holy One, blessed be He, watches over each one individually. And what is written which cannot be measured nor counted refers to human beings, who certainly cannot count them due to their great multitude.

שאו את ראש, to organise them so that they could proceed to the land of Israel immediately, without delay, each one of them knowing to which unit (flag) he belonged. At that point, no war of conquest had even been envisaged, the assumption having been that G’d would remove the inhabitants of the land of Canaan so that no face-to-face encounter would even be necessary. Evidence from Isaiah 17,9 suggests that in fact, at least partially, this even occurred after the 40 years in the desert. The prophet there reports that once again, as at the time when the Emorite and the Hittite abandoned their cities in the face of the advancing armies of the Israelites, history will repeat itself. [based on the Septuagint. Our author assumes that Isaiah may have referred to the tribe of the Girgashi, quoting Jerusalem Talmud Sh’viit 6,1 Ed.]
At any rate, due to the sin of the spies the seven Canaanites nations survived another 40 years during which they added to their sins so that at the end of that time G’d did not merely exile them but exterminated them.