GS 88:13 :alma ḏiabšia kulhun iamamia : until all the seas dry up
See the entire entry for ybš vb. to dry up

GS 88:13 :ḏpraš iabiš mn pumẖ udiglat šahla mn šihlẖ : the Euphrates dries up from its mouth and the Tigris looses flow from its river bed
See the entire entry for šāḥel, šāḥlā n.m. river; strainer