Jamieson, Fausset and Brown on Hosea 8:5

5. hath cast thee off--As the ellipsis of thee is unusual, Maurer translates, "thy calf is abominable." But the antithesis to Ho 8:3 establishes English Version, "Israel hath cast off the thing that is good"; therefore, in just retribution, "thy calf hath cast thee off," that is, is made by God the cause of thy being cast off (Ho 10:15). Jeroboam, during his sojourn in Egypt, saw Apis worshipped at Memphis, and Mnevis at Heliopolis, in the form of an ox; this, and the temple cherubim, suggested the idea of the calves set up at Dan and Beth-el.

how long ... ere they attain to innocency?--How long will they be incapable of bearing innocency? [Maurer].