SWEAT (Heb. zē‘âh, Gr. hidrōs). After the Fall, God told Adam that he would have to work hard enough to cause sweat in order to get his food (Gen.3.19). Priests in the future temple are not to wear anything that causes them to perspire (Ezek.44.18).

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SWEAT, or perspiration, is mentioned in both testaments. The Heb. term זֵעָה, H2399, is found only in Genesis 3:19 wherein sweat represents one of the calamitous results of the Fall. A verbal form appears in Ezekiel 44:18. In the NT, the term ἱδρώς, G2629, appears only in Luke 22:44 in the narrative of Christ’s passion. The word is common in classical Gr. from Homer and usually indicates great tension or pain as in suffering and death. The NT term undoubtedly refers to the Genesis 3:19 passage as the LXX uses the same term for the Heb. The wrestling of Christ with Satan before God in Gethsemane in all points fulfilled the curse of sweat upon fallen man in Eden. Bloody sweat, hematidrosis, is reported in medical lit.

International Standard Bible Encyclopedia (1915)

(ze`ah (Ge 3:19), yeza` (Eze 44:18); hidros (2 Macc 2:26; Lu 22:44)): "In the sweat of thy face shalt thou eat bread" (Ge 3:19). Somewhat difficult is the passage, which the Revised Version (British and American) renders: "But the priests the Levites, the sons of Zadok .... shall have linen tires upon their heads, and shall have linen breeches upon their loins; they shall not gird themselves with anything that causeth sweat," literally, "they shall not gird themselves with sweat" (Eze 44:15,18). The idea is evidently that profuse perspiration would make their ministrations unpleasant. The rule was of special importance in the sultry climate of Palestine.

Luke, the physician, describing the agony of the Lord in Gethsemane, says: "His sweat became as it were great drops (thromboi) of blood falling down upon the ground" (Lu 22:44, the Revised Version (British and American), following Codex Sinaiticus (a), Codex Alexandrinus, Codex Vaticanus etc., notes in margin: "Many ancient authorities omit Lu 22:43,44"). There are two difficulties of interpretation in this passage, apart from the difficulty which the physiological explanation of the phenomenon presents:

(1) the word (thrombos) translated "drop" means literally, "a clot of blood," "a lump," "a curd," and is nowhere else used in the sense of drop.

(2) It has been generally accepted that the sweat of the brow of Jesus had become bloody in appearance and in character, a symptom called in ancient medicine haimatodes hidros, "bloody sweat."

It must, however, be observed that this translation would make the Greek particle hosei, superfluous, by which, not the identity of the sweat with drops of blood, but a certain similarity or comparison must be intended. Ch. Th. Kuinoel, in his Latin commentary on the historical books of the New Testament (Leipzig, 1809, II, 654), has given all known parallel instances in history and legend, which seem to prove that under certain psychological or physiological conditions, though rarely, haimatodes hidros has occurred.

Olshausen in his Commentary, II, 469, thinks that the following points of comparison might have been in the mind of Luke:

(1) the sweat may have appeared on the forehead of Jesus in heavy drops;

(2) these may have dropped visibly to the ground, just as drops of blood fall from a wound;

(3) in addition, possibly a reddish color may have been noticeable, owing to an exudation of the arteries, though the latter is not directly expressed in the words of the evangelist. See also Dr. Stroud, On the Physical Cause of the Death of Christ, 183; Bynaeus, De morte Christi, II, 33.

The people of Palestine in Greek-Roman times were generally provided with handkerchiefs, used especially to wipe off the perspiration. The fashion was derived from Rome, whence the name of these napkins became soudarion, Latin sudarium. The late legend of Berenice or Veronica, who presented her handkerchief to the Saviour on His way to be crucified, and who found, when it had been returned to her by the Lord, that His features had been imprinted upon the cloth, is a reminiscence of this use. These handkerchiefs were frequently used to tie up small bundles of certain possessions, money, etc. (Lu 19:20). As a rule the dead had their faces covered with one, or had it tied around the head (Joh 11:44; 20:7). In Ephesus the handkerchiefs of Paul were carried to the sick, and achieved miraculous cures (Ac 19:12).

The verb hidroo, "to sweat," is found in a rather difficult passage of the Didache (i.6), which is introduced as a quotation, the source of which, however, we do not know: "Let thy alms sweat into (in ?) thy hands, until thou knowest to whom thou givest." The context seems to show that we have here a free repetition of the arguments of Sirach 12:1 ff. so that the meaning would be: "In giving charity, do not give indiscriminately or thoughtlessly, but consider carefully so that no one who is unworthy receive your benefaction." Still it is not impossible that the text is corrupt in the passage.