TgJ Zec14:12 :יִתמְסֵי בִסרֵיה וְהוּא קָאֵים עַל רַגלוֹהִי וְעֵינוֹהִי יִתמַסיָן בְגִלגְלֵיהוֹן‏ : his flesh will rot while he is standing on his feet and his eyes will rot in their eyeballs
See the entire entry for msy vb. to melt, rot