Teil Tree

Isaiah 6:13
The Hebrew word is elah, and is supposed to be the terebinth, though it is often translated “oak.” In Isaiah 6:1313But yet in it shall be a tenth, and it shall return, and shall be eaten: as a teil tree, and as an oak, whose substance is in them, when they cast their leaves: so the holy seed shall be the substance thereof. (Isaiah 6:13) “the oak” (allon) is mentioned as well as the elah, different trees are therefore doubtless indicated by the two Hebrew words. It is now generally supposed that allon refers to the oak, and elah to the terebinth, the Pistacia terebinthus.
Pistacia Palaestina1
 
1. איתן פרמן, CC BY-SA 3.0 , via Wikimedia Commons