Sing for joy to God our strength;
shout aloud to the God of Jacob!
Begin the music, strike the tambourine,
play the melodious harp and lyre.
Sound the ram’s horn at the New Moon,
and when the moon is full, on the day of our Feast;
this is a decree for Israel,
an ordinance of the God of Jacob (Psalm 81:1-4 NIV).