This compares the size of the spear with the size of a weaver's beam. Alternate translation: "a spear the size of a weaver's beam" (See: [[rc://en/ta/man/jit/figs-explicit]])
"Benaiah went down to the Egyptian." This idiom means that he met him in battle. Alternate translation: "he attacked him" (See: [[rc://en/ta/man/jit/figs-idiom]])