Ramban on Deuteronomy 1:41/רמב"ן על דברים א׳:מ״א

1ANACHNU’ (WE) ‘NA’ALEH’ (WE WILL GO UP) AND FIGHT. The purport of the word ‘anachnu’ (we) [when it is already included in the word na’aleh which means “we will go up”] is that “we ourselves” will go up and we will fight, and we will not leave the matter to our children after us, as you [Moses] have said.