This is an idiom for "your children, your crops." See how you translated this in [Deuteronomy 28:4](../28/04.md). (See: [[rc://en/ta/man/translate/figs-idiom]])
This doublet is two ways of saying that Yahweh will make the Israelites' animals many and strong. Alternate translation: "the calves of the cattle and the lambs of the flocks" (See: [[rc://en/ta/man/translate/figs-doublet]])