For the music director; according to the gittith style; by Asaph.
81:1 Shout for joy to God, our source of strength!
Shout out to the God of Jacob!
81:2 Sing a song and play the tambourine,
the pleasant sounding harp, and the ten-stringed instrument!
81:3 Sound the ram’s horn on the day of the new moon,
and on the day of the full moon when our festival begins.
81:4 For observing the festival is a requirement for Israel;
it is an ordinance given by the God of Jacob.