“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.”
King James Version (KJV)
30:29 A song - You shall have songs of praise. The night - He seems to have a particular respect to the solemnity of the passover, in which they spent some considerable part of the night in rejoicing, and singing psalms before the Lord. As when - Like the joy of one that is going up to the solemn feasts with musick.