12. great things of … law—(De 4:6, 8; Ps 19:8; 119:18, 72; 147:19, 20). Maurer not so well translates, "the many things of My law."
my law—as opposed to their inventions. This reference of Hosea to the Pentateuch alone is against the theory that some earlier written prophecies have not come down to us.
strange thing—as if a thing with which they had nothing to do.