Charles Ellicott Commentary Hosea 10:7

"[As for] Samaria, her king is cut off, as foam upon the water." — Hosea 10:7 (ASV)

Foam ... Water.— One of the most striking images in the prophecy. The word qetseph, rendered “foam”—Speaker’s Commentary reads “bubble”—properly signifies “chip” or “fragment.” Translate: Like a chip on the waters’ surface. The king is tossed on the raging seas of political life like a helpless fragment. Such was the instability of the throne of Israel at this period. (Compare to Hosea 13:11.)