Is Ephraim my dear son? is he a pleasant child? for since I spoke against him, I do earnestly remember him still: therefore my heart is troubled for him; I will surely have mercy upon him,
says the LORD.
Read Chapter 31
Ambrose of Milan
AD 397
Let us purify ourselves by tears, that the Lord our God may hear us when we lament, as he heard Ephraim when weeping, as it is written: “I have surely heard Ephraim weeping.” He expressly repeats the words of Ephraim: “You have chastised me, and I was chastised; like a calf I was not trained.” For a calf shows itself off and leaves its stall, and so Ephraim was untrained like a calf far away from the stall, because he had forsaken the stall of the Lord, followed Jeroboam and worshiped the calves, which future event was prophetically indicated through Aaron, namely, that the people of the Jews would fall after this manner. And so repenting, Ephraim says, “Turn me, and I shall be turned, for you are the Lord my God. Surely in the end of my captivity I repented, and after I learned I mourned over the days of confusion and subjected myself to you because I received reproach and made you known.” - "Concerning Repentance 2.5.36"