Frankincense is an aromatic resin used in incense and perfumes, obtained from trees of the genus Boswellia in the family Burseraceae, particularly Boswellia sacra (syn: B. bhaw-dajiana), B. carterii, B. frereana, B. serrata (B. thurifera, Indian frankincense), and B. papyrifera. The English word is derived from Old French "franc encens" (i.e., high quality incense).
There are four main species of Boswellia that produce true frankincense. Resin from each of the four is available in various grades. The grades depend on the time of harvesting; the resin is hand-sorted for quality.
Frankincense was one of the consecrated incenses (HaKetoret) described in the Hebrew Bible and Talmudused in Ketoret ceremonies. The frankincense of the Jews, as well as of the Greeks and Romans, is also called Olibanum (from the Hebrew חלבנה). Old Testament references report it in trade from Sheba. Frankincense is mentioned in the Song of Solomon Song of Solomon 4:14
It was offered on a specialized incense altar in the time when the Tabernacle was located in the First and Second Jerusalem Temples. The ketoret was an important component of the Temple service in Jerusalem. It is mentioned in the Hebrew Bible book of Exodus 30:34, where it is named levonah (lebonah in the Biblical Hebrew), meaning "white" in Hebrew. It was one of the ingredients in the perfume of the sanctuary (Exodus 30:34), and was used as an accompaniment of the meal-offering (Leviticus 2:1, 2:16, 6:15, 24:7). When burnt it emitted a fragrant odour, and the incense was a symbol of the Divine name (Malachi 1:11 ; Song of Solomon 1:3) and an emblem of prayer (Psalm 141:2 ; Luke 1:10 ; Revelation 5:8, 8:3). It was often associated with myrrh (Song of Solomon 3:6, 4:6) and with it was made an offering to the infant Jesus (Matthew 2:11). A specially "pure" kind, lebhonah zakkah, was presented with the showbread (Leviticus 24:7).