Dried sap (gum resin) from trees and bushes of certain species of the genus Boswellia. When burned, it gave off a sweet-smelling fragrance. It was an ingredient of the holy incense used at the tabernacle and the temple. It also accompanied grain offerings and was placed on each row of the showbread inside the Holy.​—Ex 30:34-36; Le 2:1; 24:7; Mt 2:11.