הוֹד֤וּ לַיהוָה֙ כִּ֣י ט֔וֹב כִּ֥י לְעוֹלָ֖ם חַסְדּֽוֹ׃
O give thanks unto the LORD; for He is good; For His mercy endureth for ever.
Rashi
to give thanks with musical instruments, for they recited (Ps. 136): “Give thanks to the Lord for He is good, for His loving kindness is eternal.”