And Ephraim. i.e. the land of Ephraim. Here is the contrast. See note on "watchman", Hosea 9:8.
an heifer. Compare Jeremiah 50:11.Micah 4:13.
passed over upon. put. yoke upon.
Jacob. Put here by Figure of speech Metonymy (of Adjunct), App-6, for Ephraim.