Genesis 37:25 and other passages mention tsori, translated balm, among trade goods, but scholarly identification of tsori is divided between storax, mastic gum and other resins, so it cannot honestly be cited as storax's own earliest attestation without settling that identification.
What would resolve this A study settling the botanical identification of the Hebrew term tsori among its candidate resins.
OpenBiblical philology, archaeobotanyMircea Eliade (ed.); Lindsay Jones (ed., 2nd ed.), Encyclopedia of Religion