Even the Lord God of hosts; the Lord is his memorial. Here we have at once a confirmation and a pledge of previous promises. Jacob had wronged Esau, and thereby incurred his displeasure; he had offended God by the injury inflicted on his brother.
He is consequently in a position of peril with respect to both God and man; he repented of his sin, and with many and hitter tears supplicated safety—salvation in the highest sense. Jacob, or Israel, in Hosea's time were involved in greater guilt and exposed to greater danger; the same unfailing remedy is recommended to them, and the same way of safety is laid open before them; let them only repent, turn to the Lord, and with tears of genuine sorrow seek his face and favor free; and the prospect would soon brighten before them.
The Name of God was a sufficient guarantee: he is Jehovah the Everlasting, and therefore Unchanging One—the same to Jacob's posterity as he had been to the patriarch himself, equally ready to accept their repentance and equally willing to bless them with safety and salvation.
He is God of hosts, and thus the Almighty One, governing all creatures, guiding all events, commanding all powers both heavenly and earthly, and ruling the whole history of humanity. His name is a remembrancer of all this, and thus his people were assured that he neither lacks the will nor the power to bless them with all needful blessings, and do them greatest good.
The name of an individual is that whereby he is known; on mention of his name the memory of him is recalled. The mention of the Divine Name not only reminds us of his being and Godhead, but recalls to our memory his attributes.
Rashi has the following brief comment on this verse: "As I have been from the beginning, so am I now; and if ye had walked with me in uprightness as Jacob our father, I would have dealt with you as dealt with him."
Thus to Abram in a land of strangers, imperiled and defenseless, God revealed himself as God Almighty; to Moses, after centuries of unfulfilled promise, he made himself known as the Unchanging One, still challenging the confidence of his people; to Hosea he brings to mind his unchanging counsel in regard to all the events of time and his unlimited control over all the realms of space and their inhabitants, and so the suitability of his attributes to the multiplied necessities and varying circumstances of his people.