This can be stated in active form. Also, here "all Israel" represents only the Israelite soldiers. AT: "that you should gather together all of the Israelite soldiers" (See: [[rc://en/ta/man/translate/figs-activepassive]] and [[rc://en/ta/man/translate/figs-synecdoche]])
This phrase means from the northern border of Israel to the southern border. AT: "from the whole nation of Israel" (See: [[rc://en/ta/man/translate/figs-merism]])
This is an exaggeration where all the grains of sand on a beach are compared to the number of Israelite soldiers. AT: "so many that they can barely be counted" (See: [[rc://en/ta/man/translate/figs-hyperbole]] and [[rc://en/ta/man/translate/figs-simile]])
The phrase "in person" means to go yourself and not send someone else instead. AT: "then lead them yourself into battle" (See: [[rc://en/ta/man/translate/figs-idiom]])