פּירוש אויף הושע 11:3

But I sent to train Ephraim, he took them etc. I sent a leader before them who would train them gently.

he took them on his arms This is Moses, concerning whom it is stated (Num. 11:12): “As the nursing father carries the sucking child.”

The form תִּרְגַּלְתִּי is like הִרגַּלְתִּי, I trained, or accustomed, and there is no similar form in Scripture.

but they did not know that I healed them They, in fact, knew, but they trod with their heels; they pretended not to know. The Aggadah in the Midrash of Rabbi Tanhuma (Gen. 48:1) expounds it in reference to the sons of Joseph. When he brought them before Jacob to bless them, Jacob perceived wicked men destined to come from Ephraim, viz. Jeroboam and Ahab, and the Holy Spirit left him, “and he said: Who are these?” Joseph prayed for mercy, and the Holy Spirit rested on Jacob and he blessed them. This is the meaning of: And I trained My spirit upon Jacob for Ephraim’s benefit, and he took them on his arms.