TgJ Ez36:6 :תֵימַר לְטוּרַיָא וֻלרָמָתָא לִפצִידַיָא וֻלחִלַיָא‏ : say to the mountains and to the hills, to the pools and to the valleys
See the entire entry for rāmā, rāmṯā n.f. hill