Some find Jeremiah’s lament in the entire Book of Lamentations; others in a part of it Lamentations 4. But most critics are of opinion that the lament is lost. Days of calamity were commemorated by lamentations on their anniversaries, and this among the number. The “Book of Dirges” was a collection of such poems which once existed but is now lost.
And made them an ordinance - Rather, “and they made them an ordinance,” they i. e. who had authority to do so, not the minstrels.