King James Version (KJV)
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. {mighty...: Heb. Rock}
Modern English
You will have a song, as in the night when a holy feast is kept; and gladness of heart, as when one goes with a flute to come to Yahweh’s mountain, to Israel’s Rock.
Hebrew
הַשִּׁיר֙ יִֽהְיֶ֣ה לָכֶ֔ם כְּלֵ֖יל הִתְקַדֶּשׁ־חָ֑ג וְשִׂמְחַ֣ת לֵבָ֗ב כַּֽהוֹלֵךְ֙ בֶּֽחָלִ֔יל לָב֥וֹא בְהַר־יְהוָ֖ה אֶל־צ֥וּר יִשְׂרָאֵֽל׃
hashiyr yihyeh lakem kleyl hitqadesh-ḥag vshimḥat lebab kahvolek beḥaliyl labvoʾ bhar-yhvah ʾel-ṣvr yishraʾel