29 And you will sing as on the night you celebrate a holy festival; your hearts will rejoice as when people playing pipes go up to the mountain of the LORD, to the Rock of Israel.

Read Isaiah 30:29 Using Other Translations

Ye shall have a song, as in the night when a holy solemnity is kept; and gladness of heart, as when one goeth with a pipe to come into the mountain of the LORD, to the mighty One of Israel.
You shall have a song as in the night when a holy feast is kept, and gladness of heart, as when one sets out to the sound of the flute to go to the mountain of the LORD, to the Rock of Israel.
But the people of God will sing a song of joy, like the songs at the holy festivals. You will be filled with joy, as when a flutist leads a group of pilgrims to Jerusalem, the mountain of the LORD — to the Rock of Israel.