Heb. mor. (1.) First mentioned as a principal ingredient in the
holy anointing oil (Ex. 30:23). It formed part of the gifts
brought by the wise men from the east, who came to worship the
infant Jesus (Matt. 2:11). It was used in embalming (John
19:39), also as a perfume (Esther 2:12; Ps. 45:8; Prov. 7:17).
It was a custom of the Jews to give those who were condemned to
death by crucifixion "wine mingled with myrrh" to produce
insensibility. This drugged wine was probably partaken of by the
two malefactors, but when the Roman soldiers pressed it upon
Jesus "he received it not" (Mark 15:23). (See GALL T0001419.)

This was the gum or viscid white liquid which flows from a
tree resembling the acacia, found in Africa and Arabia, the
Balsamodendron myrrha of botanists. The "bundle of myrrh" in
Cant. 1:13 is rather a "bag" of myrrh or a scent-bag.

(2.) Another word "lot" is also translated "myrrh" (Gen.
37:25; 43:11; R.V., marg., "or ladanum"). What was meant by this
word is uncertain. It has been thought to be the chestnut,
mastich, stacte, balsam, turpentine, pistachio nut, or the
lotus. It is probably correctly rendered by the Latin word
ladanum, the Arabic ladan, an aromatic juice of a shrub called
the Cistus or rock rose, which has the same qualities, though in
a slight degree, of opium, whence a decoction of opium is called
laudanum. This plant was indigenous to Syria and Arabia.