פּירוש אויף הושע 2:18

“In the day, says the Lord” [2:18]. When the Messiah will come, says God, you will call Me a proper husband and not like a bride who is not yet a proper wife.⁹Yalkut Shimoni, Hosea, Remez, 518. However, when the Messiah will come, then Israel will be the proper wife to the Holy One. That is to say, they are compared to the Holy One with love, like a man who loves his wife.

you shall call [Me] Ishi, etc You shall worship Me out of love and not out of fear. Ishi is an expression of marriage and the love of one’s youth.

Baali An expression of mastership and fear. And our Rabbis (Pesachim 87a, Kethuboth 71b) explained: Like a bride in her father-in-law’s house, and not like a bride in her father’s house.