Oh that, &c. Figure of speech Pathopoeia.
waters... fountain... tears. Figure of speech Catabasis.
slain. Not healed by "balm" or "physician".
Related Commentaries of Jeremiah 9:1
Jeremiah 9:1
1 Oh that my head were waters, and mine eyes a fountain of tears, that I might weep day and night for the slain of the daughter of my people!