1 tn The expression is “when you take [lift up] the sum [head] of the Israelites.”
2 tn The form is לִפְקֻדֵיהֶם (lifqudehem, “according to those that are numbered of/by them”) from the verb פָּקַד (paqad, “to visit”). But the idea of this word seems more to be that of changing or determining the destiny, and so “appoint” and “number” become clear categories of meaning for the word. Here it simply refers to the census, but when this word is used for a census it often involves mustering an army for a military purpose. Here there is no indication of a war, but it may be laying down the principle that when they should do this, here is the price. B. Jacob (Exodus, 835) uses Num 31 as a good illustration, showing that the warrior was essentially a murderer, if he killed anyone in battle. For this reason his blood was forfeit; if he survived he must pay a כֹּפֶר (kofer) because every human life possesses value and must be atoned for. The payment during the census represented a “presumptive ransom” so that they could not be faulted for what they might do in war.
3 tn The “ransom” is כֹּפֶר (kofer), a word related to words translated “atone” and “atonement.” Here the noun refers to what is paid for the life. The idea is that of delivering or redeeming by a substitute – here the substitute is the money. If they paid the amount, their lives would be safe (W. C. Kaiser, Jr., “Exodus,” EBC 2:473).
4 tn The temporal clause uses a preposition, an infinitive construct, and then an accusative. The subject is supplied: “in numbering them” means “when [you] number them.” The verb could also be rendered “when you muster them.”