Hear ye, and testify in the house of Jacob, saith the Lord GOD, the God of hosts,

Wesley's Notes

3:13 Hear ye - Prophets. The God of hosts - Who is Lord of all, and hath all power in his hand.

Jamieson-Fausset-Brown Bible Commentary

13. testify in the house, &c.-that is, against the house of Jacob. God calls on the same persons as in Am 3:9, namely, the heathen Philistines and the Egyptians to witness with their own eyes Samaria's corruptions above described, so that none may be able to deny the justice of Samaria's punishment [Maurer].

God of hosts-having all the powers of heaven and earth at His command, and therefore One calculated to strike terror into the hearts of the guilty whom He threatens.

Matthew Henry's Concise Commentary

3:9-15 That power which is an instrument of unrighteousness, will justly be brought down and broken. What is got and kept wrongfully, will not be kept long. Some are at ease, but there will come a day of visitation, and in that day, all they are proud of, and put confidence in, shall fail them. God will inquire into the sins of which they have been guilty in their houses, the robbery they have stored up, and the luxury in which they lived. The pomp and pleasantness of men's houses, do not fortify against God's judgments, but make sufferings the more grievous and vexatious. Yet a remnant, according to the election of grace, will be secured by our great and good Shepherd, as from the jaws of destruction, in the worst times.