Jeremiah
Jeremiah 31:2-3
God declares 'I have loved you with an everlasting love' (ahavat olam ahavtikh), and even in the moment of Israel's exile and sin, He calls them to return, promising that His love has never ceased.
כֹּ֚ה אָמַ֣ר יְהֹוָ֔ה מָצָ֥א חֵן֙ בַּמִּדְבָּ֔ר עַ֖ם שְׂרִ֣ידֵי חָ֑רֶב הָל֥וֹךְ לְהַרְגִּיע֖וֹ יִשְׂרָאֵֽל׃ מֵרָח֕וֹק יְהֹוָ֖ה נִרְאָ֣ה לִ֑י וְאַהֲבַ֤ת עוֹלָם֙ אֲהַבְתִּ֔יךְ עַל־כֵּ֖ן מְשַׁכְתִּ֥יךְ חָֽסֶד׃
Thus said GOD: The people escaped from the sword, Found favor in the wilderness; When Israel was marching homeward GOD was revealed long ago. Eternal love I conceived for you then; Therefore I continue My grace to you.
Why it matters — The foundational biblical expression of God's unconditional, eternal love for Israel regardless of their spiritual state.