Acacia

(Heb. shittim) Ex. 25:5, R.V. probably the Acacia seyal (the
gum-arabic tree); called the "shittah" tree (Isa. 41:19). Its
wood is called shittim wood (Ex. 26:15,26; 25:10,13,23,28,
etc.). This species (A. seyal) is like the hawthorn, a gnarled
and thorny tree. It yields the gum-arabic of commerce. It is
found in abundance in the Sinaitic peninsula.