“You shall have a song
As in the night
When a holy feast is kept.
You shall have
Gladness of heart,
As when one sets out
To the sound of the flute
To go to the mountain of Yahweh,
To the Rock of Israel.”
The Israelites were to be as happy as when they have a song at night during their holy feasts. They would have a glad heart. The sound of the flute could be heard. They were about to go up to the mountain of Yahweh, probably in Jerusalem. This was the rock of Israel, Yahweh.