He presumably didn't say it in Latin though ;-)
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https://en.wikipedia.org/wiki/Maharbal discusses the merits of this statement at the time. I find it in keeping with his branch of service, as a cavalry commander.
(Weinberg's line about 30[1] was an echo of Lasalle's. https://en.wikipedia.org/wiki/Jack_Weinberg#"Don't_trust_any..." https://fr.wikipedia.org/wiki/Antoine_Charles_Louis_de_Lasal... )
Q. How did Napoleon's HQ decide which branch to assign butterbars fresh from the academy?
A. Oral exam. Ask each candidate the same question: what is 2+2?
If he answers "4": artillery
If he yells out "3!" upon hearing just "2 plus...": cavalry
If he counts on his fingers under the table: infantry
If he asks "what would you like it to be?": logistics
[1] some friends came back from watching The Who and reported that when Daltrey sang "I hope I die before I get old" the guy next to them yelled "too late!"
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Incidentally, the aut ... aut ... construction reminds me of https://lamport.azurewebsites.net/pubs/lamport-howtowrite.ps page 3, only in one temporal dimension, sans parentheses, rather than two physical.
https://en.wikipedia.org/wiki/Calgacus
As an aside: Agricola's army is supposed to have camped on the hill where my house is!