Matthew Poole and continuators on Genesis 9:3

3. Every moving thing , that liveth , shall be meat for you , even as the green herb have I given you all things .

Which is wholesome and fit for food, and clean: An exception to be gathered both from the nature of the thing, and from the distinction of clean and unclean Beasts mentioned before and afterwards.

This is added to exclude the use of those Creatures which either died of themselves, or were killed by wild Beasts, which is here forbidden implicitely, and afterwards expresly. See Exod. 22. 31. Levit. 22. 8.

It is not a command that we must, but a permission that we may, eat of them. A grant possibly given before the Flood, but now expressed, either because the former allowance might seem to be forfeited, or because as men now grew more infirm and needed better nourishment, so the Earth was grown more feeble by the Flood, and its fruits yeilded less and worse nourishment.

Understand this with the limitation above mentioned. The green Herbs were given before. chap. 1. 29.

Marginal references: Chap. 1. 29.