חַֽסְדֵ֣י יְ֭הוָה עוֹלָ֣ם אָשִׁ֑ירָה לְדֹ֥ר וָדֹ֓ר ׀ אוֹדִ֖יעַ אֱמוּנָתְךָ֣ בְּפִֽי׃
I will sing of the mercies of the LORD for ever; To all generations will I make known Thy faithfulness with my mouth.
Rashi on Psalms
I shall make known Your faithfulness, with my mouth What I know of You: that You keep Your promise and fulfill Your words.