¹ sn The hyssop is a small bush that grows throughout the Sinai, probably the aromatic herb Origanum Maru L., or Origanum Aegyptiacum. The plant also grew out of the walls in Jerusalem (1 Kgs 4:33). See L. Baldensperger and G. M. Crowfoot, “Hyssop,” PEQ 63 (1931): 89-98. A piece of hyssop was also useful to the priests because it worked well for sprinkling.

¹ sn In addition to the general references, see R. K. Harrison, “The Biblical Problem of Hyssop,” EvQ 26 (1954): 218-24.

² sn Hyssop was a small aromatic bush; exact identification of the plant is uncertain. The hyssop used to lift the wet sponge may have been a form of reed (κάλαμος, kalamos, “reed,” is used in Matt 27:48 and Mark 15:36); the biblical name can refer to several different species of plant (at least eighteen different plants have been suggested).

² sn “Hyssop” was a small plant (see 1 Kgs 4:33) used to apply water or blood in purification rites (see Exod 12:22; Lev 14:4-6, 49-52; Num 19:6-18). The psalmist uses the language and imagery of such rites to describe spiritual cleansing through forgiveness.

² sn Twigs of hyssop (probably one or several species of marjoram thymus), a spice and herb plant that grows out of walls in Palestine (see 1 Kgs 4:33 [5:13 HT], HALOT 27 s.v. אֵזוֹב, and J. E. Hartley, Leviticus [WBC], 195), were particularly leafy and therefore especially useful for sprinkling the purifying liquid (cf. vv. 5-7). Many of the details of the ritual procedure are obscure. It has been proposed, for example, that the “cedar wood” was a stick to which the hyssop was bound with the crimson material to make a sort of sprinkling instrument (Hartley, 195). In light of the burning of these three materials as part of the preparation of the ashes of the red heifer in Num 19:5-6, however, this seems unlikely.

² sn There is no clear explanation available as to why these items were to be burned with the heifer. N. H. Snaith suggests that in accordance with Babylonian sacrifices they would have enhanced the rites with an aroma (Leviticus and Numbers [NCB], 272). In Lev 14 the wood and the hyssop may have been bound together by the scarlet wool to make a sprinkling device. It may be that the symbolism is what is important here. Cedar wood, for example, is durable; it may have symbolized resistance to future corruption and defilement, an early acquired immunity perhaps (R. K. Harrison, Numbers [WEC], 256).