כִּֽי־אַתָּ֣ה אָבִ֔ינוּ כִּ֤י אַבְרָהָם֙ לֹ֣א יְדָעָ֔נוּ וְיִשְׂרָאֵ֖ל לֹ֣א יַכִּירָ֑נוּ אַתָּ֤ה יְהוָה֙ אָבִ֔ינוּ גֹּאֲלֵ֥נוּ מֵֽעוֹלָ֖ם שְׁמֶֽךָ׃
For Thou art our Father; for Abraham knoweth us not, and Israel doth not acknowledge us; Thou, O LORD, art our Father, Our Redeemer from everlasting is Thy name.
Rashi on Isaiah
For You are our father and it is incumbent upon You to look and see our troubles.
Ibn Ezra on Isaiah
Thou art our father, and we are Thy children; Thou art a father that is always existing.