Ebla

ì-sa-tù - fire (VE 783; Krebernik 1983: 30)

equated with Sum. (d)GIBIL

PS
*ˀiš(-āt)- - fire (Fronzaroli 1965a: 138, 145, 149; Kogan 2011: 194–195; Kogan 2015: 39; HALOT 92, CDG 44)