The command of the Lord comes to the brother of Jared. The command is to gather flocks and seeds. More than just flocks and seeds, it is reproductive flocks. Specifically they are told to bring male and female. If they brought whatever they had, there would likely have been both male and female. The reason for adding this admonition is to let them know that they will be on a colonizing mission. Given the crossing of the waters to come, there is probably some parallel reference intended here to the story of Noah.