This can be stated in active form. Alternate translation: "As Moses wrote" or "They did this because Moses wrote" (See: [[rc://en/ta/man/jit/figs-activepassive]])
This is an idiom meaning the first male born into a family. This referred to both animals and people. Alternate translation: "The first male that a mother gives birth to" or "Every firstborn male" (See: [[rc://en/ta/man/jit/figs-idiom]])