the night ... solemnity - As in the passover night ye celebrate your deliverance from Egypt, so shall ye celebrate your rescue from Assyrian bondage. Translate, “the solemnity” (Exo 12:42).
goeth with a pipe - or flute. They used to go up to Jerusalem (“the mountain of the Lord,” Zion) at the three feasts with music and gladness (Deu 16:16; Ezr 2:65; Psa 122:1-4).