the pride of Israel - wherewith they reject the warnings of God’s prophets (Hos 5:2), and prefer their idols to God (Hos 7:10; Jer 13:17).
testify to his face - openly to his face he shall be convicted of the pride which is so palpable in him. Or, “in his face,” as in Isa 3:9.
Judah ... shall fall with them - This prophecy is later than Hos 4:15, when Judah had not gone so far in idolatry; now her imitation of Israel’s bad example provokes the threat of her being doomed to share in Israel’s punishment.