Lamentations 3:63 Halakhah

שִׁבְתָּ֤ם וְקִֽימָתָם֙ הַבִּ֔יטָה אֲנִ֖י מַנְגִּינָתָֽם׃ (ס)

Behold Thou their sitting down, and their rising up; I am their song.

Read halakhic rulings (Jewish law) on Lamentations 3:63: and classical halakhic sources.