Set the trumpet to thy mouth. He shall come as an eagle against the house of the LORD, because they have transgressed my covenant, and trespassed against my law.
In Hosea 8:14 Judah is said to multiply fenced cities; and in Hosea 8:7-9, Israel, to its great hurt, is said to have gone up to Assyria for help. This answers best to the reign of Menahem. For it was then that Uzziah of Judah, his contemporary, built fenced cities (2 Chronicles 26:6; 2 Chronicles 26:9-10). Then also Israel turned to Assyria, and had to pay for their sinful folly a thousand talents of silver (2 Kings 15:19). (Maurer.)
Set the trumpet to thy mouth - to give warning of the approach of the enemy: the Hebrew is literally, 'to thy palate - (i:e., mouth, Job 31:30, margin) the trumpet;' the abruptness of expression indicates the suddenness of the attack. So Hosea 5:8.
As an eagle - the Assyrian Shalmaneser, the conqueror and captor of the ten tribes; and the Babylonian Nebuchadnezzar: the conqueror and captor of Judah (Deuteronomy 28:49; Jeremiah 48:40; Habakkuk 1:8).
Against the house of the Lord - not the temple, but Israel, viewed as the family of God - (Hosea 9:15, "I will drive them out of mine house" - i:e., my land or heritage, the Holy Land; Numbers 12:7, "My servant Moses is faithful in all mine house;" Zechariah 9:8; Hebrews 3:2; 1 Timothy 3:15; 1 Peter 4:17).