Matthew Poole and continuators on Hosea 5:3

3 I know Ephraim , and Israel is not hid from me; for now O Ephraim thou committest whoredom , and Israel is defiled .

These revolters neither are, or can be so deep as to conceal themselves, their designs, contrivances and practices from me: I throughly know Ephraim, the revolters are called Israel in this verse, who is not hid from me. It is an elegant repetition of the same thing in different words.

All thy fair pretences thou canst put upon thy devised Religion, cannot better it, still 'tis down right Idolatry, or spiritual Whoredom.

Israel here is Ephraim, and when Israel is said to be polluted, it is to be understood both of spiritual and corporal pollution which mostly are linked together, and draw on each other.