חַ֥י חַ֛י ה֥וּא יוֹדֶ֖ךָ כָּמ֣וֹנִי הַיּ֑וֹם אָ֣ב לְבָנִ֔ים יוֹדִ֖יעַ אֶל־אֲמִתֶּֽךָ׃
The living, the living, he shall praise Thee, As I do this day; The father to the children shall make known Thy truth.
Read midrashic interpretation of Isaiah 38:19: and classical rabbinic exegesis.