Bel-ṣarbi or Šar-ṣarbati (Akkadian: "lord of the poplar") was a Mesopotamian god associated with poplars. He was also known under the Sumerian name Lugal-asal. He frequently appears in enumerations of deities associated with the underworld who formed the entourage of Nergal, and in some cases could be equated with him. A possible feminine counterpart, NIN-ṣar-BE, is known from neo-Assyrian sources, and is sometimes identified with earlier Ištar-ṣarbatum from Ebla in modern scholarship.